Name That Triangle! Classifying Triangles on the Coordinate Plane. LESSON 5.1 Assignment
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1 LESSON.1 Assignment Name Date Name That Triangle! Classifying Triangles on the Coordinate Plane 1. The grid shown is a map of Stoneville and the locations of several businesses in the town. A line segment has been drawn between the locations of the mall and the diner. Using this line segment as one side of a triangle, determine the business (or businesses) whose location, when connected with the line segment, would result in each of the following types of triangles. y 8 6 Pet Bike Shop 4 Shop Movie 2 Theater Gym Garage Mall 22 Diner 24 Pizza Parlor Grocery Store Bakery x a. an isosceles triangle b. an acute triangle c. a scalene triangle d. a right triangle Chapter Assignments 8
2 LESSON.1 Assignment page 2 e. an equilateral triangle f. a obtuse triangle 2. The grid shown represents a map of Jose s neighborhood. It shows the locations of his house as well as the houses of four friends. y Jose Ed Miles Brad x Malcolm 28 a. Draw a triangle between the houses of Jose, Ed, and Brad. Determine if this triangle is a scalene, an isosceles, or an equilateral triangle. Explain your reasoning. 86 Chapter Assignments
3 LESSON.1 Assignment page 3 Name Date b. Determine if the triangle is a right triangle. Explain your reasoning. If it is not a right triangle, use a protractor to determine what type of triangle it is. c. Jose, Miles, and Brad are meeting for band rehearsal. Miles claims that the distance from Jose s house to his house is the same as the distance from Jose s house to Brad s house. Is his claim correct? Explain your answer. What kind of triangle is formed if you connect all their houses in the shape of a triangle? Chapter Assignments 87
4 LESSON.1 Assignment page 4 d. A new boy, James, moved into the neighborhood at the location (23, 2). Plot and label James s house on the grid. Then, determine if the triangle formed by connecting his house, Jose s house, and Malcolm s house is a right triangle. 88 Chapter Assignments
5 LESSON.2 Assignment Name Date Inside Out Triangle Sum, Exterior Angle, and Exterior Angle Inequality Theorems 1. Determine the measure of angle UPM in the figure shown. Explain your reasoning and show all your work. P 21 3 B U 62 M Chapter Assignments 89
6 LESSON.2 Assignment page 2 2. In the figure shown, AB is parallel to DE. Determine the measure of each missing angle in the figure. B D A E 3. You are building a triangular play area for your new puppy. You decide that the play area will have angle measures of 08 and 408 as shown a. Which side of the play area is the longest? b. Which side of the play area is the shortest? 90 Chapter Assignments
7 LESSON.2 Assignment page 3 Name Date c. Explain how you determined your answers in parts (a) and (b). Solve for x x (2x + ) 9 (x 1 ) (8x + ) (9x 7 ) Chapter Assignments 91
8 LESSON.2 Assignment page 4 6. Use the figure shown to write a paragraph proof of the Exterior Angle Inequality Theorem. P S R Q Given: Triangle PQR with exterior angle PRS Prove: m PRS > m P and m PRS > m Q 92 Chapter Assignments
9 LESSON.3 Assignment Name Date Trade Routes and Pasta, Anyone? The Triangle Inequality Theorem 1. You are building a triangular pen for baby ducks. The sides of the pen will be made from lumber you have left from other projects. You have two 12-foot boards, one 14-foot board, one 8-foot board, one 4-foot board, one 3-foot board, and one 2-foot board. Use this information to answer parts (a) through (f). a. Suppose you choose the 14-foot board and the 4-foot board. Of the boards you have left over, what is the longest board that can be used for the third side of the pen? Explain. b. Suppose you choose a 12-foot board and the 8-foot board. Of the boards you have left over, what is the shortest board that can be used for the third side of the pen? Explain. c. Suppose you choose a 12-foot board and the 4-foot board. Of the boards you have left over, which board(s) can be used for the third side of the pen? Explain. Chapter Assignments 93
10 LESSON.3 Assignment page 2 d. How many different triangular pens can be formed using the 4-foot board? List the side lengths of each possible triangular pen. e. If you only have three boards and their lengths are feet, 8 feet, and 4 feet, can you form a triangular pen? Explain. f. Suppose you decide to build a pen with side lengths of 14 feet, 12 feet, and 8 feet as shown. Which angle has the greatest measure? Which angle has the least measure? Explain. 8 ft 12 ft 14 ft List the angles and sides of each triangle in order from least to greatest. Do not measure the angles or sides. 2. D 16 cm 21 cm B 7 cm C 94 Chapter Assignments
11 LESSON.3 Assignment page 3 Name Date 3. Q 60 P 63 7 R 4. Triangle ABC with the following: m A 27, m B 119, and m C 34. Triangle RST with the following: RS 8 centimeters, ST 20 centimeters, and RT 14 centimeters Determine whether it is possible to form a triangle using segments with the following measurements. Explain inches, 21 inches, 7 inches feet, 10 feet, 18 feet millimeters, 7.2 millimeters,.1 millimeters Chapter Assignments 9
12 96 Chapter Assignments
13 LESSON.4 Assignment Name Date Stamps Around the World Properties of a Triangle 1. The legs of the isosceles triangle each measure 14 inches. Calculate the length of the hypotenuse. 14 in. 4 c 14 in Calculate the value of c. c ft ft 3. The perimeter of the square is 32 centimeters. Calculate the length of its diagonal. 4. Calculate the value of a m a a Chapter Assignments 97
14 LESSON.4 Assignment page 2. The length of a diagonal of the square is 36 centimeters. Calculate the length of each side. 36 cm 6. The length of a diagonal of the square is 12 centimeters. Calculate the area. 12 cm 7. Calculate the area of the figure shown using the information given. The figure is composed of a triangle and a semicircle. Use 3.14 for p. 12 cm 12 cm 8. The length of a diagonal of the square in the figure shown is 60 inches. Calculate the perimeter of the figure. The figure is composed of a square and a semicircle. 60 in. 98 Chapter Assignments
15 LESSON. Assignment Name Date More Stamps, Really? Properties of a Triangle 1. The length of the hypotenuse in the 30º260º290º triangle shown is 28 meters. Calculate the lengths of sides a and b. a m b The length of the side opposite the 30-degree angle is feet. Calculate the lengths of sides b and c. b 30 c 60 ft 3. The length of the side opposite the 60-degree angle is 8 millimeters. Calculate the lengths of sides a and c. a 60 c 8 mm 30 Chapter Assignments 99
16 LESSON. Assignment page 2 4. A broadcast antenna is situated on top of a tower. The signal travels from the antenna to your house so you can watch TV. The angle of elevation from your house to the tower measures 30 degrees, and the distance from your house to the tower is 00 feet. Calculate the height of the tower and the distance the signal travels. Antenna ft 30 House. The length of the longer leg in the 30º260º290º triangle shown is 22 miles. Calculate the length of the hypotenuse miles 6. The length of the shorter leg in the 30º260º290º triangle shown is 13 meters. Calculate the length of the hypotenuse m Chapter Assignments
17 LESSON. Assignment page 3 Name Date 7. Calculate the perimeter of the trapezoid. 6 cm cm 8. Calculate the area of the triangle. 20 cm Calculate the area of the trapezoid. 6 cm 8 cm 4 Chapter Assignments 101
18 LESSON. Assignment page A broadcast antenna is situated on top of a tower, and the signal travels from the antenna to your house so that you can watch TV. The angle of elevation from your house to the tower measures 30 degrees, and the distance from your house to the tower is 77 feet. Calculate the height of the tower and the distance the signal travels. Antenna a 60 c 77 ft 30 House 102 Chapter Assignments
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