Math 1230, Notes 2. Aug. 28, Math 1230, Notes 2 Aug. 28, / 17
|
|
- Patricia Wade
- 5 years ago
- Views:
Transcription
1 Math 1230, Notes 2 Aug. 28, 2014 Math 1230, Notes 2 Aug. 28, / 17
2 This fills in some material between pages 10 and 11 of notes 1. We first discuss the relation between geometry and the quadratic formula. We can look for only real solutions. We start with Proposition 2.5. As stated above, it says that (a + b) (a b) = a 2 b 2. From the geometric figure in class, or pg. 122 of Boyer, figure 7.6, we see that this formula is only proved for 0 < b < a. Math 1230, Notes 2 Aug. 28, / 17
3 Now suppose we want to solve x 2 px + q 2 = 0. Since geometric solutions can only be real numbers, Euclid can only find the solution when q < 1 2p. We will also assume that q > 0. We draw AB of length p. Let a = 1 2p. Let C bisect AB. So AC = CB = a = 1 2p. Construct the perpendicular to AB from C, say down, of length q, to a point M. Draw the circle of radius a = 1 2 p around M. Since q < 1 2p, this circle will intersect CB at a point D between C and B. (Note that the diagonal from M to B must be of length longer than 1 2 p, while the vertical line from M to C is of length less than 1 2 p. I claim that x = DB solves x 2 px + q 2 = 0. To see this, we let b = CD. We already saw that a = 1 2p. From the Pythagorean theorem, b 2 + q 2 = a 2, so b = ( 1 2 p) 2 q 2. Then x = CD = a b = 1 2 p (1 2 p ) 2 q 2 which is one of the solutions we get using the quadratic formula. Math 1230, Notes 2 Aug. 28, / 17
4 We now repeat the statement of Book 2, proposition 6: If a straight line be bisected and a straight line be added to it in a straight line, the rectangle contained by the whole (with the added straight line) and the added straight line together with the square on the half is equal to the square on the straight line made up of the half and the added straight line. We will apply this in the next item. Math 1230, Notes 2 Aug. 28, / 17
5 We now repeat the statement of Book 2, proposition 6: If a straight line be bisected and a straight line be added to it in a straight line, the rectangle contained by the whole (with the added straight line) and the added straight line together with the square on the half is equal to the square on the straight line made up of the half and the added straight line. We will apply this in the next item. book 2, prop 11 Math 1230, Notes 2 Aug. 28, / 17
6 We now repeat the statement of Book 2, proposition 6: If a straight line be bisected and a straight line be added to it in a straight line, the rectangle contained by the whole (with the added straight line) and the added straight line together with the square on the half is equal to the square on the straight line made up of the half and the added straight line. We will apply this in the next item. book 2, prop 11 To cut a straight line so that the rectangle contained by the whole and one of the pieces is equal to the square on the remaining piece. The construction is shown in the figure in the Elements, page 63 of the version on the class website, which will be explained in class. Math 1230, Notes 2 Aug. 28, / 17
7 prop 12 Math 1230, Notes 2 Aug. 28, / 17
8 prop 12 In obtuse-angled triangles the square on the side subtending the obtuse angle is greater than the sum of the squares on the other two sides by twice the rectangle contained by one of the sides around the obtuse angle to which a perpendicular falls and the straight line cut off outside the triangle by the perpendicular towards the obtuse angle. Math 1230, Notes 2 Aug. 28, / 17
9 prop 12 In obtuse-angled triangles the square on the side subtending the obtuse angle is greater than the sum of the squares on the other two sides by twice the rectangle contained by one of the sides around the obtuse angle to which a perpendicular falls and the straight line cut off outside the triangle by the perpendicular towards the obtuse angle. What theorem is this? Math 1230, Notes 2 Aug. 28, / 17
10 prop 12 In obtuse-angled triangles the square on the side subtending the obtuse angle is greater than the sum of the squares on the other two sides by twice the rectangle contained by one of the sides around the obtuse angle to which a perpendicular falls and the straight line cut off outside the triangle by the perpendicular towards the obtuse angle. What theorem is this? book 7, prop 2 Math 1230, Notes 2 Aug. 28, / 17
11 prop 12 In obtuse-angled triangles the square on the side subtending the obtuse angle is greater than the sum of the squares on the other two sides by twice the rectangle contained by one of the sides around the obtuse angle to which a perpendicular falls and the straight line cut off outside the triangle by the perpendicular towards the obtuse angle. What theorem is this? book 7, prop 2 To find the gcd of two given numbers which are not prime to each other. The method will be explained in class. Math 1230, Notes 2 Aug. 28, / 17
12 book 9, prop 35 Math 1230, Notes 2 Aug. 28, / 17
13 book 9, prop 35 If there is any multitude whatsoever of continually proportional numbers, and numbers equal to the first are subtracted from both the second and the last, then as the excess of the second number is to the first, so the excess of the last will be to the sum of all the numbers before it. Math 1230, Notes 2 Aug. 28, / 17
14 book 9, prop 35 If there is any multitude whatsoever of continually proportional numbers, and numbers equal to the first are subtracted from both the second and the last, then as the excess of the second number is to the first, so the excess of the last will be to the sum of all the numbers before it. book 11: Starts solid geometry. There are 28 definitions ending with the definitions of the platonic solids. (discussed in the next set of notes) Math 1230, Notes 2 Aug. 28, / 17
15 Before continuing, make sure you have read the final parts of notes 1. Math 1230, Notes 2 Aug. 28, / 17
16 Hilbert s system Math 1230, Notes 2 Aug. 28, / 17
17 Hilbert s system Undefined: Point, Line, Incidence Lies on, contains, between, congruent Math 1230, Notes 2 Aug. 28, / 17
18 Hilbert s system Undefined: Point, Line, Incidence Lies on, contains, between, congruent Axioms: Math 1230, Notes 2 Aug. 28, / 17
19 Hilbert s system Undefined: Point, Line, Incidence Lies on, contains, between, congruent Axioms: Axioms of incidence Math 1230, Notes 2 Aug. 28, / 17
20 Hilbert s system Undefined: Point, Line, Incidence Lies on, contains, between, congruent Axioms: Axioms of incidence Postulate I.1. For every two points A, B there exists a line a that contains each of the points A, B. Math 1230, Notes 2 Aug. 28, / 17
21 Hilbert s system Undefined: Point, Line, Incidence Lies on, contains, between, congruent Axioms: Axioms of incidence Postulate I.1. For every two points A, B there exists a line a that contains each of the points A, B. Postulate I.2. For every two points A, B there exists no more than one line that contains each of the points A, B. Math 1230, Notes 2 Aug. 28, / 17
22 Hilbert s system Undefined: Point, Line, Incidence Lies on, contains, between, congruent Axioms: Axioms of incidence Postulate I.1. For every two points A, B there exists a line a that contains each of the points A, B. Postulate I.2. For every two points A, B there exists no more than one line that contains each of the points A, B. Postulate I.3. There exists at least two points on a line. There exist at least three points that do not lie on a line. Math 1230, Notes 2 Aug. 28, / 17
23 Postulate I.4. For any three points A, B, C that do not lie on the same line there exists a plane α that contains each of the points A, B, C. For every plane there exists a point which it contains. Math 1230, Notes 2 Aug. 28, / 17
24 Postulate I.4. For any three points A, B, C that do not lie on the same line there exists a plane α that contains each of the points A, B, C. For every plane there exists a point which it contains. Postulate I.5. For any three points A, B, C that do not lie on one and the same line there exists no more than one plane that contains each of the three points A, B, C. Math 1230, Notes 2 Aug. 28, / 17
25 Postulate I.4. For any three points A, B, C that do not lie on the same line there exists a plane α that contains each of the points A, B, C. For every plane there exists a point which it contains. Postulate I.5. For any three points A, B, C that do not lie on one and the same line there exists no more than one plane that contains each of the three points A, B, C. Postulate I.6. If two points A, B of a line l lie in a plane α then every point of l lies in the plane α. Math 1230, Notes 2 Aug. 28, / 17
26 Postulate I.4. For any three points A, B, C that do not lie on the same line there exists a plane α that contains each of the points A, B, C. For every plane there exists a point which it contains. Postulate I.5. For any three points A, B, C that do not lie on one and the same line there exists no more than one plane that contains each of the three points A, B, C. Postulate I.6. If two points A, B of a line l lie in a plane α then every point of l lies in the plane α. Postulate I.7. If two planes α, β have a point A in common then they have at least one more point B in common. Math 1230, Notes 2 Aug. 28, / 17
27 Postulate I.4. For any three points A, B, C that do not lie on the same line there exists a plane α that contains each of the points A, B, C. For every plane there exists a point which it contains. Postulate I.5. For any three points A, B, C that do not lie on one and the same line there exists no more than one plane that contains each of the three points A, B, C. Postulate I.6. If two points A, B of a line l lie in a plane α then every point of l lies in the plane α. Postulate I.7. If two planes α, β have a point A in common then they have at least one more point B in common. Postulate I.8. plane. There exist at least four points which do not lie in a Math 1230, Notes 2 Aug. 28, / 17
28 Axioms of Order Math 1230, Notes 2 Aug. 28, / 17
29 Axioms of Order Postulate II.1. Math 1230, Notes 2 Aug. 28, / 17
30 Axioms of Order Postulate II.1. If a point B lies between a point A and a point C then the points A, B, C are three distinct points of a line, and B then also lies between C and A. Math 1230, Notes 2 Aug. 28, / 17
31 Axioms of Order Postulate II.1. If a point B lies between a point A and a point C then the points A, B, C are three distinct points of a line, and B then also lies between C and A. Postulate II.2. Math 1230, Notes 2 Aug. 28, / 17
32 Axioms of Order Postulate II.1. If a point B lies between a point A and a point C then the points A, B, C are three distinct points of a line, and B then also lies between C and A. Postulate II.2. For two points A and C, there always exists at least one point B on the line AC such that C lies between A and B. Math 1230, Notes 2 Aug. 28, / 17
33 Axioms of Order Postulate II.1. If a point B lies between a point A and a point C then the points A, B, C are three distinct points of a line, and B then also lies between C and A. Postulate II.2. For two points A and C, there always exists at least one point B on the line AC such that C lies between A and B. Postulate II.3. Math 1230, Notes 2 Aug. 28, / 17
34 Axioms of Order Postulate II.1. If a point B lies between a point A and a point C then the points A, B, C are three distinct points of a line, and B then also lies between C and A. Postulate II.2. For two points A and C, there always exists at least one point B on the line AC such that C lies between A and B. Postulate II.3. Of any three points on a line there exists no more than one that lies between the other two. Math 1230, Notes 2 Aug. 28, / 17
35 Postulate II.4. Math 1230, Notes 2 Aug. 28, / 17
36 Postulate II.4. Let A, B, C be three points that do not lie on a line and let a be a line in the plane ABC which does not meet any of the points A, B, C. If the line a passes through a point of the segment AB, it also passes through a point of the segment AC, or through a point of the segment BC. Math 1230, Notes 2 Aug. 28, / 17
37 Axioms of Congruence Math 1230, Notes 2 Aug. 28, / 17
38 Axioms of Congruence Postulate III.1. Math 1230, Notes 2 Aug. 28, / 17
39 Axioms of Congruence Postulate III.1. If A, B are two points on a line l, and A is a point on the same or on another line l then it is always possible to find a point B on a given side of the line l such that AB and A B are congruent. Math 1230, Notes 2 Aug. 28, / 17
40 Axioms of Congruence Postulate III.1. If A, B are two points on a line l, and A is a point on the same or on another line l then it is always possible to find a point B on a given side of the line l such that AB and A B are congruent. Postulate III.2. Math 1230, Notes 2 Aug. 28, / 17
41 Axioms of Congruence Postulate III.1. If A, B are two points on a line l, and A is a point on the same or on another line l then it is always possible to find a point B on a given side of the line l such that AB and A B are congruent. Postulate III.2. If a segment A B and a segment A B are congruent to the same segment AB, then segments A B and A B are congruent to each other. Math 1230, Notes 2 Aug. 28, / 17
42 Axioms of Congruence Postulate III.1. If A, B are two points on a line l, and A is a point on the same or on another line l then it is always possible to find a point B on a given side of the line l such that AB and A B are congruent. Postulate III.2. If a segment A B and a segment A B are congruent to the same segment AB, then segments A B and A B are congruent to each other. Postulate III.3. Math 1230, Notes 2 Aug. 28, / 17
43 Axioms of Congruence Postulate III.1. If A, B are two points on a line l, and A is a point on the same or on another line l then it is always possible to find a point B on a given side of the line l such that AB and A B are congruent. Postulate III.2. If a segment A B and a segment A B are congruent to the same segment AB, then segments A B and A B are congruent to each other. Postulate III.3. On a line a, let AB and BC be two segments which, except for B, have no points in common. Furthermore, on the same or another line l, let A B and B C be two segments which, except for B, have no points in common. In that case if AB A B and BCB C, then ACA C. Math 1230, Notes 2 Aug. 28, / 17
44 Postulate III.4. Math 1230, Notes 2 Aug. 28, / 17
45 Postulate III.4. If ABC is an angle and if B C is a ray, then there is exactly one ray B A on each side of line B C such that A B C = ABC. Furthermore, every angle is congruent to itself. Math 1230, Notes 2 Aug. 28, / 17
46 Postulate III.4. If ABC is an angle and if B C is a ray, then there is exactly one ray B A on each side of line B C such that A B C = ABC. Furthermore, every angle is congruent to itself. Postulate III.5. (SAS) Math 1230, Notes 2 Aug. 28, / 17
47 Postulate III.4. If ABC is an angle and if B C is a ray, then there is exactly one ray B A on each side of line B C such that A B C = ABC. Furthermore, every angle is congruent to itself. Postulate III.5. (SAS) If for two triangles ABC and A B C the congruences AB A B, AC A C and BAC B A C are valid, then the congruence ABC A B C is also satisfied. Math 1230, Notes 2 Aug. 28, / 17
48 Axiom of Parallels Math 1230, Notes 2 Aug. 28, / 17
49 Axiom of Parallels Postulate IV.1. Math 1230, Notes 2 Aug. 28, / 17
50 Axiom of Parallels Postulate IV.1. Let l be any line and A a point not on it. Then there is at most one line in the plane that contains l and A that passes through A and does not intersect l. Math 1230, Notes 2 Aug. 28, / 17
51 Axiom of Parallels Postulate IV.1. Let l be any line and A a point not on it. Then there is at most one line in the plane that contains l and A that passes through A and does not intersect l. Axioms of Continuity Math 1230, Notes 2 Aug. 28, / 17
52 Axiom of Parallels Postulate IV.1. Let l be any line and A a point not on it. Then there is at most one line in the plane that contains l and A that passes through A and does not intersect l. Axioms of Continuity Postulate V.1. (Archimedes Axiom) Math 1230, Notes 2 Aug. 28, / 17
53 Axiom of Parallels Postulate IV.1. Let l be any line and A a point not on it. Then there is at most one line in the plane that contains l and A that passes through A and does not intersect l. Axioms of Continuity Postulate V.1. (Archimedes Axiom) If AB and CD are any segments, then there exists a number n such that n copies of CD constructed contiguously from A along the ray AB willl pass beyond the point B. Math 1230, Notes 2 Aug. 28, / 17
54 Postulate V.2. (Line Completeness) Math 1230, Notes 2 Aug. 28, / 17
55 Postulate V.2. (Line Completeness) An extension of a set of points on a line with its order and congruence relations that would preserve the relations existing among the original elements as well as the fundamental properties of line order and congruence (Axioms I-III and V-1) is impossible. Math 1230, Notes 2 Aug. 28, / 17
56 Postulate V.2. (Line Completeness) An extension of a set of points on a line with its order and congruence relations that would preserve the relations existing among the original elements as well as the fundamental properties of line order and congruence (Axioms I-III and V-1) is impossible. Alternative to V2: Dedekind s axiom: Suppose that the set of all points on a line l is the union of two nonempty sets Σ 1 and Σ 2 such that no point of Σ 1 is between two points of Σ 2 and viceversa. Then there is a unique point O of l such that O lies between two points P and Q if and only if one of these points is in Σ 1 and the other is in Σ 2 and neither is equal to O. (Basis for a definition of real numbers Dedekind cut ) Math 1230, Notes 2 Aug. 28, / 17
57 Homework, due at beginning of class on 9/4. All problems are worth 5 points unless stated otherwise. 1. Suppose that l is a line and p a point not on l. Prove using Hilbert s axioms of incidence that there is a unique plane containing l and p. 2. Use the Euclidean algorithm to f ind the greatest common divisor of 567, 759, and 839. Comment on anything atypical that you run into. Math 1230, Notes 2 Aug. 28, / 17
58 3. On the next page you will find page 122 of Boyer s book. In the section beginning If a Greek scholar.. on line 10, he describes how to use Euclid s axioms and propositions to solve x 2 ax + b 2. Using the propositions, you could construct this solution using a straight edge and compass, if you were presented with line segments of lengths a and b. (Recall that you cannot measure anything numerically with straight edge and compass.) On page 3 of these notes I give another description of the same method. Note that I do not have to refer specifically to proposition 2.5. Now do problem 5 of Boyer, on page 132. It says: Given line segments a and b, construct with straight edge and compass alone a solution of the equation x 2 = ax + b 2. (You are not meant do actually do it. Explain how you would find x in the style of the book, or of my description on page 3. You do not have to use any result like propositions 2.5 or 2.6. You just need to use the theorem of Pythagoras. Stated geometrically, this says that if A,B,C is a right triangle, then the square with the hypotenuse as one side is equal (in area) to the (sum of the areas of) two squares on the other two sides.) Math 1230, Notes 2 Aug. 28, / 17
59
2 Homework. Dr. Franz Rothe February 21, 2015 All3181\3181_spr15h2.tex
Math 3181 Dr. Franz Rothe February 21, 2015 All3181\3181_spr15h2.tex Name: Homework has to be turned in this handout. For extra space, use the back pages, or blank pages between. The homework can be done
More informationChapter 3. Betweenness (ordering) A system satisfying the incidence and betweenness axioms is an ordered incidence plane (p. 118).
Chapter 3 Betweenness (ordering) Point B is between point A and point C is a fundamental, undefined concept. It is abbreviated A B C. A system satisfying the incidence and betweenness axioms is an ordered
More informationLecture 1: Axioms and Models
Lecture 1: Axioms and Models 1.1 Geometry Although the study of geometry dates back at least to the early Babylonian and Egyptian societies, our modern systematic approach to the subject originates in
More informationLogic, Proof, Axiom Systems
Logic, Proof, Axiom Systems MA 341 Topics in Geometry Lecture 03 29-Aug-2011 MA 341 001 2 Rules of Reasoning A tautology is a sentence which is true no matter what the truth value of its constituent parts.
More informationDefinitions, Axioms, Postulates, Propositions, and Theorems from Euclidean and Non-Euclidean Geometries by Marvin Jay Greenberg ( )
Definitions, Axioms, Postulates, Propositions, and Theorems from Euclidean and Non-Euclidean Geometries by Marvin Jay Greenberg (2009-03-26) Logic Rule 0 No unstated assumptions may be used in a proof.
More informationMAT 3271: Selected solutions to problem set 7
MT 3271: Selected solutions to problem set 7 Chapter 3, Exercises: 16. Consider the Real ffine Plane (that is what the text means by the usual Euclidean model ), which is a model of incidence geometry.
More informationDefinitions, Axioms, Postulates, Propositions, and Theorems from Euclidean and Non-Euclidean Geometries by Marvin Jay Greenberg
Definitions, Axioms, Postulates, Propositions, and Theorems from Euclidean and Non-Euclidean Geometries by Marvin Jay Greenberg Undefined Terms: Point, Line, Incident, Between, Congruent. Incidence Axioms:
More information4 Arithmetic of Segments Hilbert s Road from Geometry
4 Arithmetic of Segments Hilbert s Road from Geometry to Algebra In this section, we explain Hilbert s procedure to construct an arithmetic of segments, also called Streckenrechnung. Hilbert constructs
More informationLAMC Beginners Circle November 10, Oleg Gleizer. Warm-up
LAMC Beginners Circle November 10, 2013 Oleg Gleizer oleg1140@gmail.com Warm-up Problem 1 Can a power of two (a number of the form 2 n ) have all the decimal digits 0, 1,..., 9 the same number of times?
More informationDefinitions, Axioms, Postulates, Propositions, and Theorems from Euclidean and Non-Euclidean Geometries by Marvin Jay Greenberg ( )
Definitions, Axioms, Postulates, Propositions, and Theorems from Euclidean and Non-Euclidean Geometries by Marvin Jay Greenberg (2005-02-16) Logic Rules (Greenberg): Logic Rule 1 Allowable justifications.
More informationClass IX Chapter 5 Introduction to Euclid's Geometry Maths
Class IX Chapter 5 Introduction to Euclid's Geometry Maths Exercise 5.1 Question 1: Which of the following statements are true and which are false? Give reasons for your answers. (i) Only one line can
More informationEUCLIDEAN AND HYPERBOLIC CONDITIONS
EUCLIDEAN AND HYPERBOLIC CONDITIONS MATH 410. SPRING 2007. INSTRUCTOR: PROFESSOR AITKEN The first goal of this handout is to show that, in Neutral Geometry, Euclid s Fifth Postulate is equivalent to the
More informationOctober 16, Geometry, the Common Core, and Proof. John T. Baldwin, Andreas Mueller. The motivating problem. Euclidean Axioms and Diagrams
October 16, 2012 Outline 1 2 3 4 5 Agenda 1 G-C0-1 Context. 2 Activity: Divide a line into n pieces -with string; via construction 3 Reflection activity (geometry/ proof/definition/ common core) 4 mini-lecture
More informationActivity Sheet 1: Constructions
Name ctivity Sheet 1: Constructions Date 1. Constructing a line segment congruent to a given line segment: Given a line segment B, B a. Use a straightedge to draw a line, choose a point on the line, and
More informationExhaustion: From Eudoxus to Archimedes
Exhaustion: From Eudoxus to Archimedes Franz Lemmermeyer April 22, 2005 Abstract Disclaimer: Eventually, I plan to polish this and use my own diagrams; so far, most of it is lifted from the web. Exhaustion
More informationNozha Directorate of Education Form : 2 nd Prep. Nozha Language Schools Ismailia Road Branch
Cairo Governorate Department : Maths Nozha Directorate of Education Form : 2 nd Prep. Nozha Language Schools Sheet Ismailia Road Branch Sheet ( 1) 1-Complete 1. in the parallelogram, each two opposite
More informationHonors 213 / Math 300. Second Hour Exam. Name
Honors 213 / Math 300 Second Hour Exam Name Monday, March 6, 2006 95 points (will be adjusted to 100 pts in the gradebook) Page 1 I. Some definitions (5 points each). Give formal definitions of the following:
More informationChapter 12: Ruler and compass constructions
Chapter 12: Ruler and compass constructions Matthew Macauley Department of Mathematical Sciences Clemson University http://www.math.clemson.edu/~macaule/ Math 4120, Spring 2014 M. Macauley (Clemson) Chapter
More informationNeutral Geometry. October 25, c 2009 Charles Delman
Neutral Geometry October 25, 2009 c 2009 Charles Delman Taking Stock: where we have been; where we are going Set Theory & Logic Terms of Geometry: points, lines, incidence, betweenness, congruence. Incidence
More informationHon 213. Third Hour Exam. Name
Hon 213 Third Hour Exam Name Friday, April 27, 2007 1. (5 pts.) Some definitions and statements of theorems (5 pts. each) a, What is a Lambert quadrilateral? b. State the Hilbert Parallel Postulate (being
More informationLesson 9.1 Skills Practice
Lesson 9.1 Skills Practice Name Date Earth Measure Introduction to Geometry and Geometric Constructions Vocabulary Write the term that best completes the statement. 1. means to have the same size, shape,
More informationExercise 2.1. Identify the error or errors in the proof that all triangles are isosceles.
Exercises for Chapter Two He is unworthy of the name of man who is ignorant of the fact that the diagonal of a square is incommensurable with its side. Plato (429 347 B.C.) Exercise 2.1. Identify the error
More informationCOURSE STRUCTURE CLASS IX Maths
COURSE STRUCTURE CLASS IX Maths Units Unit Name Marks I NUMBER SYSTEMS 08 II ALGEBRA 17 III COORDINATE GEOMETRY 04 IV GEOMETRY 28 V MENSURATION 13 VI STATISTICS & PROBABILITY 10 Total 80 UNIT I: NUMBER
More informationGreece. Chapter 5: Euclid of Alexandria
Greece Chapter 5: Euclid of Alexandria The Library at Alexandria What do we know about it? Well, a little history Alexander the Great In about 352 BC, the Macedonian King Philip II began to unify the numerous
More informationFoundations of Neutral Geometry
C H A P T E R 12 Foundations of Neutral Geometry The play is independent of the pages on which it is printed, and pure geometries are independent of lecture rooms, or of any other detail of the physical
More informationGeometry Triangles
1 Geometry Triangles 2015-12-08 www.njctl.org 2 Table of Contents Click on the topic to go to that section Triangles Triangle Sum Theorem Exterior Angle Theorem Inequalities in Triangles Similar Triangles
More informationMathematics 2260H Geometry I: Euclidean geometry Trent University, Winter 2012 Quiz Solutions
Mathematics 2260H Geometry I: Euclidean geometry Trent University, Winter 2012 Quiz Solutions Quiz #1. Tuesday, 17 January, 2012. [10 minutes] 1. Given a line segment AB, use (some of) Postulates I V,
More informationMathematics 3210 Spring Semester, 2005 Homework notes, part 8 April 15, 2005
Mathematics 3210 Spring Semester, 2005 Homework notes, part 8 April 15, 2005 The underlying assumption for all problems is that all points, lines, etc., are taken within the Poincaré plane (or Poincaré
More informationJakarta International School 8 th Grade AG1
Jakarta International School 8 th Grade AG1 Practice Test - Black Points, Lines, and Planes Name: Date: Score: 40 Goal 5: Solve problems using visualization and geometric modeling Section 1: Points, Lines,
More informationEuclidean Geometry. The Elements of Mathematics
Euclidean Geometry The Elements of Mathematics Euclid, We Hardly Knew Ye Born around 300 BCE in Alexandria, Egypt We really know almost nothing else about his personal life Taught students in mathematics
More information2. In ABC, the measure of angle B is twice the measure of angle A. Angle C measures three times the measure of angle A. If AC = 26, find AB.
2009 FGCU Mathematics Competition. Geometry Individual Test 1. You want to prove that the perpendicular bisector of the base of an isosceles triangle is also the angle bisector of the vertex. Which postulate/theorem
More informationTHE FIVE GROUPS OF AXIOMS.
2 THE FIVE GROUPS OF AXIOMS. 1. THE ELEMENTS OF GEOMETRY AND THE FIVE GROUPS OF AXIOMS. Let us consider three distinct systems of things. The things composing the first system, we will call points and
More informationCOURSE STRUCTURE CLASS -IX
environment, observance of small family norms, removal of social barriers, elimination of gender biases; mathematical softwares. its beautiful structures and patterns, etc. COURSE STRUCTURE CLASS -IX Units
More information(RC3) Constructing the point which is the intersection of two existing, non-parallel lines.
The mathematical theory of ruller and compass constructions consists on performing geometric operation with a ruler and a compass. Any construction starts with two given points, or equivalently a segment
More informationDISCOVERING GEOMETRY Over 6000 years ago, geometry consisted primarily of practical rules for measuring land and for
Name Period GEOMETRY Chapter One BASICS OF GEOMETRY Geometry, like much of mathematics and science, developed when people began recognizing and describing patterns. In this course, you will study many
More informationName: Class: Date: 5. If the diagonals of a rhombus have lengths 6 and 8, then the perimeter of the rhombus is 28. a. True b.
Indicate whether the statement is true or false. 1. If the diagonals of a quadrilateral are perpendicular, the quadrilateral must be a square. 2. If M and N are midpoints of sides and of, then. 3. The
More informationCMA Geometry Unit 1 Introduction Week 2 Notes
CMA Geometry Unit 1 Introduction Week 2 Notes Assignment: 9. Defined Terms: Definitions betweenness of points collinear points coplanar points space bisector of a segment length of a segment line segment
More informationHigher Geometry Problems
Higher Geometry Problems (1) Look up Eucidean Geometry on Wikipedia, and write down the English translation given of each of the first four postulates of Euclid. Rewrite each postulate as a clear statement
More informationThe Theorem of Pythagoras
CONDENSED LESSON 9.1 The Theorem of Pythagoras In this lesson you will Learn about the Pythagorean Theorem, which states the relationship between the lengths of the legs and the length of the hypotenuse
More informationAdditional Mathematics Lines and circles
Additional Mathematics Lines and circles Topic assessment 1 The points A and B have coordinates ( ) and (4 respectively. Calculate (i) The gradient of the line AB [1] The length of the line AB [] (iii)
More informationSolutions to Exercises in Chapter 1
Solutions to Exercises in hapter 1 1.6.1 heck that the formula 1 a c b d works for rectangles but not for 4 parallelograms. b a c a d d b c FIGURE S1.1: Exercise 1.6.1. rectangle and a parallelogram For
More informationExercise 5.1: Introduction To Euclid s Geometry
Exercise 5.1: Introduction To Euclid s Geometry Email: info@mywayteaching.com Q1. Which of the following statements are true and which are false? Give reasons for your answers. (i)only one line can pass
More informationHow can you find decimal approximations of square roots that are not rational? ACTIVITY: Approximating Square Roots
. Approximating Square Roots How can you find decimal approximations of square roots that are not rational? ACTIVITY: Approximating Square Roots Work with a partner. Archimedes was a Greek mathematician,
More informationHigher Geometry Problems
Higher Geometry Problems (1 Look up Eucidean Geometry on Wikipedia, and write down the English translation given of each of the first four postulates of Euclid. Rewrite each postulate as a clear statement
More informationMATH 392 Geometry Through History Solutions/Lecture Notes for Class Monday, February 8
Background MATH 392 Geometry Through History Solutions/Lecture Notes for Class Monday, February 8 Recall that on Friday we had started into a rather complicated proof of a result showing that the usual
More information12 Inversion by a Circle
12 Inversion by a Circle 12.1 Definition and construction of the inverted point Let D be a open circular disk of radius R and center O, and denote its boundary circle by D. Definition 12.1 (Inversion by
More informationSOLUTIONS SECTION A [1] = 27(27 15)(27 25)(27 14) = 27(12)(2)(13) = cm. = s(s a)(s b)(s c)
1. (A) 1 1 1 11 1 + 6 6 5 30 5 5 5 5 6 = 6 6 SOLUTIONS SECTION A. (B) Let the angles be x and 3x respectively x+3x = 180 o (sum of angles on same side of transversal is 180 o ) x=36 0 So, larger angle=3x
More informationCBSE Class IX Syllabus. Mathematics Class 9 Syllabus
Mathematics Class 9 Syllabus Course Structure First Term Units Unit Marks I Number System 17 II Algebra 25 III Geometry 37 IV Co-ordinate Geometry 6 V Mensuration 5 Total 90 Second Term Units Unit Marks
More informationPart (1) Second : Trigonometry. Tan
Part (1) Second : Trigonometry (1) Complete the following table : The angle Ratio 42 12 \ Sin 0.3214 Cas 0.5321 Tan 2.0625 (2) Complete the following : 1) 46 36 \ 24 \\ =. In degrees. 2) 44.125 = in degrees,
More informationGeometry Honors Summer Packet
Geometry Honors Summer Packet Hello Student, First off, welcome to Geometry Honors! In the fall, we will embark on an eciting mission together to eplore the area (no pun intended) of geometry. This packet
More informationGeometry GENERAL GEOMETRY
Geometry GENERAL GEOMETRY Essential Vocabulary: point, line, plane, segment, segment bisector, midpoint, congruence I can use the distance formula to determine the area and perimeters of triangles and
More informationUnit 5, Lesson 4.3 Proving the Pythagorean Theorem using Similarity
Unit 5, Lesson 4.3 Proving the Pythagorean Theorem using Similarity Geometry includes many definitions and statements. Once a statement has been shown to be true, it is called a theorem. Theorems, like
More informationHomework has to be turned in this handout. For extra space, use the back pages, or blank pages between. due January 22/23
Math 3181 Name: Dr. Franz Rothe January 15, 2014 All3181\3181_spr14h1.tex Homework has to be turned in this handout. For extra space, use the back pages, or blank pages between. due January 22/23 1 Homework
More informationEuclid s Elements Part II
Euclid s Elements Part II The discovery of incommensurable magnitudes steered the ancient Greeks away from the study of number and towards the development of geometry. s a result, geometry was pushed in
More informationMA 460 Supplement: Analytic geometry
M 460 Supplement: nalytic geometry Donu rapura In the 1600 s Descartes introduced cartesian coordinates which changed the way we now do geometry. This also paved for subsequent developments such as calculus.
More informationHIGHER GEOMETRY. 1. Notation. Below is some notation I will use. KEN RICHARDSON
HIGHER GEOMETRY KEN RICHARDSON Contents. Notation. What is rigorous math? 3. Introduction to Euclidean plane geometry 3 4. Facts about lines, angles, triangles 6 5. Interlude: logic and proofs 9 6. Quadrilaterals
More informationGeometry and axiomatic Method
Chapter 1 Geometry and axiomatic Method 1.1 Origin of Geometry The word geometry has its roots in the Greek word geometrein, which means earth measuring. Before the time of recorded history, geometry originated
More information2007 Hypatia Contest
Canadian Mathematics Competition An activity of the Centre for Education in Mathematics and Computing, University of Waterloo, Waterloo, Ontario 007 Hypatia Contest Wednesday, April 18, 007 Solutions c
More informationDr Prya Mathew SJCE Mysore
1 2 3 The word Mathematics derived from two Greek words Manthanein means learning Techne means an art or technique So Mathematics means the art of learning related to disciplines or faculties disciplines
More informationChapter (Circle) * Circle - circle is locus of such points which are at equidistant from a fixed point in
Chapter - 10 (Circle) Key Concept * Circle - circle is locus of such points which are at equidistant from a fixed point in a plane. * Concentric circle - Circle having same centre called concentric circle.
More informationEuclidean Geometry Proofs
Euclidean Geometry Proofs History Thales (600 BC) First to turn geometry into a logical discipline. Described as the first Greek philosopher and the father of geometry as a deductive study. Relied on rational
More informationCBSE OSWAAL BOOKS LEARNING MADE SIMPLE. Published by : 1/11, Sahitya Kunj, M.G. Road, Agra , UP (India) Ph.: ,
OSWAAL BOOKS LEARNING MADE SIMPLE CBSE SOLVED PAPER 2018 MATHEMATICS CLASS 9 Published by : OSWAAL BOOKS 1/11, Sahitya Kunj, M.G. Road, Agra - 282002, UP (India) Ph.: 0562 2857671, 2527781 email: contact@oswaalbooks.com
More information2) Are all linear pairs supplementary angles? Are all supplementary angles linear pairs? Explain.
1) Explain what it means to bisect a segment. Why is it impossible to bisect a line? 2) Are all linear pairs supplementary angles? Are all supplementary angles linear pairs? Explain. 3) Explain why a four-legged
More informationchapter 1 vector geometry solutions V Consider the parallelogram shown alongside. Which of the following statements are true?
chapter vector geometry solutions V. Exercise A. For the shape shown, find a single vector which is equal to a)!!! " AB + BC AC b)! AD!!! " + DB AB c)! AC + CD AD d)! BC + CD!!! " + DA BA e) CD!!! " "
More informationA sequence of thoughts on constructible angles.
A sequence of thoughts on constructible angles. Dan Franklin & Kevin Pawski Department of Mathematics, SUNY New Paltz, New Paltz, NY 12561 Nov 23, 2002 1 Introduction In classical number theory the algebraic
More informationSubject: General Mathematics
Subject: General Mathematics Written By Or Composed By:Sarfraz Talib Chapter No.1 Matrix A rectangular array of number arranged into rows and columns is called matrix OR The combination of rows and columns
More information10. Circles. Q 5 O is the centre of a circle of radius 5 cm. OP AB and OQ CD, AB CD, AB = 6 cm and CD = 8 cm. Determine PQ. Marks (2) Marks (2)
10. Circles Q 1 True or False: It is possible to draw two circles passing through three given non-collinear points. Mark (1) Q 2 State the following statement as true or false. Give reasons also.the perpendicular
More informationREVISED vide circular No.63 on
Circular no. 63 COURSE STRUCTURE (FIRST TERM) CLASS -IX First Term Marks: 90 REVISED vide circular No.63 on 22.09.2015 UNIT I: NUMBER SYSTEMS 1. REAL NUMBERS (18 Periods) 1. Review of representation of
More information2007 Cayley Contest. Solutions
Canadian Mathematics Competition An activity of the Centre for Education in Mathematics and Computing, University of Waterloo, Waterloo, Ontario 007 Cayley Contest (Grade 10) Tuesday, February 0, 007 Solutions
More informationMATHEMATICS (IX-X) (CODE NO. 041) Session
MATHEMATICS (IX-X) (CODE NO. 041) Session 2018-19 The Syllabus in the subject of Mathematics has undergone changes from time to time in accordance with growth of the subject and emerging needs of the society.
More information1 Solution of Final. Dr. Franz Rothe December 25, Figure 1: Dissection proof of the Pythagorean theorem in a special case
Math 3181 Dr. Franz Rothe December 25, 2012 Name: 1 Solution of Final Figure 1: Dissection proof of the Pythagorean theorem in a special case 10 Problem 1. Given is a right triangle ABC with angle α =
More informationUNIT 1: SIMILARITY, CONGRUENCE, AND PROOFS. 1) Figure A'B'C'D'F' is a dilation of figure ABCDF by a scale factor of 1. 2 centered at ( 4, 1).
1) Figure A'B'C'D'F' is a dilation of figure ABCDF by a scale factor of 1. 2 centered at ( 4, 1). The dilation is Which statement is true? A. B. C. D. AB B' C' A' B' BC AB BC A' B' B' C' AB BC A' B' D'
More informationAnticipations of Calculus - Archimedes
Anticipations of Calculus - Archimedes Let ABC be a segment of a parabola bounded by the straight line AC and the parabola ABC, and let D be the middle point of AC. Draw the straight line DBE parallel
More information1 Line n intersects lines l and m, forming the angles shown in the diagram below. 4 In the diagram below, MATH is a rhombus with diagonals AH and MT.
1 Line n intersects lines l and m, forming the angles shown in the diagram below. 4 In the diagram below, MATH is a rhombus with diagonals AH and MT. Which value of x would prove l m? 1) 2.5 2) 4.5 3)
More informationMaths Assessment Framework Year 10 Higher
Success Criteria for all assessments: Higher Tier 90% 9 80% 8 70% 7 60% 6 50% 5 Please note the GCSE Mathematics is one of the first GCSEs which will be graded by number rather than A*, A, B, C etc. Roughly,
More information1.3 Distance and Midpoint Formulas
Graduate Teacher Department of Mathematics San Diego State University Dynamical Systems Program August 29, 2011 In mathematics, a theorem is a statement that has been proven on the basis of previously
More informationMathematics 2260H Geometry I: Euclidean geometry Trent University, Fall 2016 Solutions to the Quizzes
Mathematics 2260H Geometry I: Euclidean geometry Trent University, Fall 2016 Solutions to the Quizzes Quiz #1. Wednesday, 13 September. [10 minutes] 1. Suppose you are given a line (segment) AB. Using
More informationUnit 3: Number, Algebra, Geometry 2
Unit 3: Number, Algebra, Geometry 2 Number Use standard form, expressed in standard notation and on a calculator display Calculate with standard form Convert between ordinary and standard form representations
More informationNozha Directorate of Education Form : 2 nd Prep
Cairo Governorate Department : Maths Nozha Directorate of Education Form : 2 nd Prep Nozha Language Schools Geometry Revision Sheet Ismailia Road Branch Sheet ( 1) 1-Complete 1. In the parallelogram, each
More informationOBJECTIVES UNIT 1. Lesson 1.0
OBJECTIVES UNIT 1 Lesson 1.0 1. Define "set," "element," "finite set," and "infinite set," "empty set," and "null set" and give two examples of each term. 2. Define "subset," "universal set," and "disjoint
More informationMathematics Class 9 Syllabus. Course Structure. I Number System 17 II Algebra 25 III Geometry 37 IV Co-ordinate Geometry 6 V Mensuration 5 Total 90
Mathematics Class 9 Syllabus Course Structure First Term Units Unit Marks I Number System 17 II Algebra 25 III Geometry 37 IV Co-ordinate Geometry 6 V Mensuration 5 Total 90 Second Term Units Unit Marks
More informationOutline. 1 Overview. 2 From Geometry to Numbers. 4 Interlude on Circles. 5 An Area function. 6 Side-splitter. 7 Pythagorean Theorem
December 14, 2012 Outline 1 2 3 4 5 6 7 8 Agenda 1 G-SRT4 Context. orems about similarity 2 Proving that there is a field 3 Areas of parallelograms and triangles 4 lunch/discussion: Is it rational to fixate
More informationTERMWISE SYLLABUS SESSION CLASS-IX SUBJECT : MATHEMATICS. Course Structure. Schedule for Periodic Assessments and CASExam. of Session
TERMWISE SYLLABUS SESSION-2018-19 CLASS-IX SUBJECT : MATHEMATICS Course Structure Units Unit Name Marks I NUMBER SYSTEMS 08 II ALGEBRA 17 III COORDINATE GEOMETRY 04 IV GEOMETRY 28 V MENSURATION 13 VI STATISTICS
More informationGeometry Unit 2 Notes Logic, Reasoning and Proof
Geometry Unit 2 Notes Logic, Reasoning and Proof Review Vocab.: Complementary, Supplementary and Vertical angles. Syllabus Objective: 2.1 - The student will differentiate among definitions, postulates,
More informationtriangles in neutral geometry three theorems of measurement
lesson 10 triangles in neutral geometry three theorems of measurement 112 lesson 10 in this lesson we are going to take our newly created measurement systems, our rulers and our protractors, and see what
More informationContact. Emina. Office: East Hall 1825 Phone:
to Contact Emina Email: eminaa@umich.edu Office: East Hall 1825 Phone: 734 647 5518 About me Born in Bosnia: Real home Utah Family Your turn Please fill out the questionnaire Back to business Class website
More informationNAME DATE PER. 1. ; 1 and ; 6 and ; 10 and 11
SECOND SIX WEEKS REVIEW PG. 1 NME DTE PER SECOND SIX WEEKS REVIEW Using the figure below, identify the special angle pair. Then write C for congruent, S for supplementary, or N for neither. d 1. ; 1 and
More informationCLASS-IX MATHEMATICS. For. Pre-Foundation Course CAREER POINT
CLASS-IX MATHEMATICS For Pre-Foundation Course CAREER POINT CONTENTS S. No. CHAPTERS PAGE NO. 0. Number System... 0 3 0. Polynomials... 39 53 03. Co-ordinate Geometry... 54 04. Introduction to Euclid's
More informationDistance in the Plane
Distance in the Plane The absolute value function is defined as { x if x 0; and x = x if x < 0. If the number a is positive or zero, then a = a. If a is negative, then a is the number you d get by erasing
More information0809ge. Geometry Regents Exam Based on the diagram below, which statement is true?
0809ge 1 Based on the diagram below, which statement is true? 3 In the diagram of ABC below, AB AC. The measure of B is 40. 1) a b ) a c 3) b c 4) d e What is the measure of A? 1) 40 ) 50 3) 70 4) 100
More information2011 Olympiad Solutions
011 Olympiad Problem 1 Let A 0, A 1, A,..., A n be nonnegative numbers such that Prove that A 0 A 1 A A n. A i 1 n A n. Note: x means the greatest integer that is less than or equal to x.) Solution: We
More information2.8 Proving angle relationships cont. ink.notebook. September 20, page 84 page cont. page 86. page 85. Standards. Cont.
2.8 Proving angle relationships cont. ink.notebook page 84 page 83 2.8 cont. page 85 page 86 Lesson Objectives Standards Lesson Notes 2.8 Proving Angle Relationships Cont. Press the tabs to view details.
More informationthe coordinates of C (3) Find the size of the angle ACB. Give your answer in degrees to 2 decimal places. (4)
. The line l has equation, 2 4 3 2 + = λ r where λ is a scalar parameter. The line l 2 has equation, 2 0 5 3 9 0 + = µ r where μ is a scalar parameter. Given that l and l 2 meet at the point C, find the
More information8-2 The Pythagorean Theorem and Its Converse. Find x. 27. SOLUTION: The triangle with the side lengths 9, 12, and x form a right triangle.
Find x. 27. The triangle with the side lengths 9, 12, and x form a right triangle. In a right triangle, the sum of the squares of the lengths of the legs is equal to the square of the length of the hypotenuse.
More informationAlg. (( Sheet 1 )) [1] Complete : 1) =.. 3) =. 4) 3 a 3 =.. 5) X 3 = 64 then X =. 6) 3 X 6 =... 7) 3
Cairo Governorate Department : Maths Nozha Directorate of Education Form : 2 nd Prep. Nozha Language Schools Sheet Ismailia Road Branch [1] Complete : 1) 3 216 =.. Alg. (( Sheet 1 )) 1 8 2) 3 ( ) 2 =..
More informationALLEN PARK HIGH SCHOOL F i r s t S e m e s t e r R e v i e w
ALLEN PARK HIGH SCHOOL i r s t S e m e s t e r R e v i e w G EOMERY APHS/MAH Winter 2010 DIRECIONS his section of test is 68 items, which you will work in this booklet. Mark the correct answer as directed
More informationPrentice Hall Geometry (c) 2007 correlated to American Diploma Project, High School Math Benchmarks
I1.1. Add, subtract, multiply and divide integers, fractions and decimals. I1.2. Calculate and apply ratios, proportions, rates and percentages to solve problems. I1.3. Use the correct order of operations
More informationWORKSHEET ON NUMBERS, MATH 215 FALL. We start our study of numbers with the integers: N = {1, 2, 3,...}
WORKSHEET ON NUMBERS, MATH 215 FALL 18(WHYTE) We start our study of numbers with the integers: Z = {..., 2, 1, 0, 1, 2, 3,... } and their subset of natural numbers: N = {1, 2, 3,...} For now we will not
More informationGeometry beyond Euclid
Geometry beyond Euclid M.S. Narasimhan IISc & TIFR, Bangalore narasim@math.tifrbng.res.in 1 Outline: Aspects of Geometry which have gone beyond Euclid Two topics which have played important role in development
More information5200: Similarity of figures. Define: Lemma: proof:
5200: Similarity of figures. We understand pretty well figures with the same shape and size. Next we study figures with the same shape but different sizes, called similar figures. The most important ones
More information