Assignment Assignment for Lesson 5.1
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1 Assignment Assignment for Lesson.1 Name Date Ace Reporter Review of Ratio and Proportion Write a ratio that is equivalent to each ratio : : : 7 Solve each proportion x x x You are on the refreshment committee for a school dance. The committee decides to serve pizza at the dance and you need to determine the type of pizzas to order. You survey 4 students and get the following results. 10 students prefer cheese 26 students prefer pepperoni 9 students prefer mushroom The committee expects about 220 students to attend the dance. Use this information to answer parts (a) through (d). a. Set up and solve a proportion to predict the number of students at the dance who will choose cheese pizza. Chapter Assignments 87
2 b. Set up and solve a proportion to predict the number of students at the dance who will choose pepperoni pizza. c. Set up and solve a proportion to predict the number of students at the dance who will choose mushroom pizza. d. Suppose each pizza is cut into 12 slices and you estimate that each student at the dance will eat 2 slices of pizza. How many of each type of pizza should you order for the dance? 88 Chapter Assignments
3 Assignment Assignment for Lesson.2 Name Date Picture Picture on the Wall... Similar Polygons Determine whether each pair of polygons is similar. If the polygons are similar, write a similarity statement. Explain your reasoning. 1. A 2 ft F 1 ft E B 3 ft 6 ft 3. ft H 7 ft G 2 ft D 4 ft 2. 3 m L m C m R P 4 m M 4 m N 3 m Q Chapter Assignments 89
4 3. While on vacation, you buy a postcard of Niagara Falls. The postcard is a rectangle 6 inches long and 4 inches wide. You want to enlarge the postcard to make a poster to hang on your bedroom wall. You want the length of the poster to be 4 feet. What will be the width of the poster in feet? 4. You are building a model of your neighborhood. The scale of the model is 300 : 1. In the model, your back yard is a rectangle with a perimeter of 6 inches. What is the actual perimeter of your back yard in feet?. Two stops signs are similar. The smaller stop sign has a side length of 12 inches and the larger stop sign has a side length of 16 inches. What is the ratio of the area of the smaller stop sign to the area of the larger stop sign? 90 Chapter Assignments
5 Assignment Assignment for Lesson.3 Name Date To Be or Not To Be Similar? Similar Triangle Postulates 1. I n the figure below, NS BE. Use the information given in the figure to determine m SNA, m NAS, m ABE and m BAE. Is NSA similar to EBA? If the triangles are similar, write a similarity statement. Use complete sentences to explain your answers. B N A S 8 32 E Chapter Assignments 91
6 2. Use a ruler to determine whether the triangles shown are similar. Explain your answer. E D F A C B 92 Chapter Assignments
7 Name Date 3. In the figure shown, NU CV. Use the figure to complete parts (a) through (c). M U N C V a. Is MUN MCV? Explain your answer. b. Is MNU MVC? Explain your answer. c. Is CMV UMN? Explain your answer. Chapter Assignments 93
8 4. In the figure shown, segments AB and DE are parallel. The length of segment BC is 10 units and the length of segment CD is units. Use this information to calculate the value of x. Explain how you found your answer. D C 2x + E 10 A 11x 4 B 94 Chapter Assignments
9 Assignment Assignment for Lesson.4 Name Date Triangle Side Ratios Angle Bisector/Proportional Side Theorem Calculate the indicated length in each figure. 1. KN bisects K. Calculate MN. 3 m L K 14 m 16 m M N 2. SQ bisects S. Calculate SR. R S Q 9 in. 13 in. 10 in. T Chapter Assignments 9
10 3. Use the figure and the given information to write a paragraph proof of the Angle Bisector/Proportional Side Theorem. W X Z Y V Given: WZ bisects XWY and XW VY Prove: WX XZ WY YZ 96 Chapter Assignments
11 Name Date 4. The figure shows a truss on a bridge. Segment BF bisects angle CBE. Use this information to determine EF and CF. B 7 ft 2 ft A D E F 24 ft C. The figure shows a truss for a barn roof. Segment DF bisects angle ADB and segment EG bisects angle CEB. Triangle DBE is an equilateral triangle. Use this information to determine the perimeter of the truss. B A F G 7 ft 7 ft D E 8 ft 6 ft 8 ft C Chapter Assignments 97
12 98 Chapter Assignments
13 Assignment Assignment for Lesson. Name Date Geometric Mean Similar Right Triangles Solve for x x 8 18 x 2 3. Use the figure and the given information to write a paragraph proof of the Right Triangle/Altitude Similarity Theorem. C Given: Triangle ABC is a right triangle with altitude CD. Prove: ABC ACD CBD A D B Chapter Assignments 99
14 4. The geometric mean of two numbers is 20. One of the numbers is 0. What is the other number?. The geometric mean of two numbers is 3. One of the numbers is 3. What is the other number? 6. Use the figure and the given information to prove the Right Triangle Altitude Theorem 1. C Given: Triangle ABC is a right triangle with altitude CD. Prove: AD CD CD BD A D B 100 Chapter Assignments
15 Name Date 7. Use the figure and the given information to prove the Right Triangle Altitude Theorem 2. C Given: Triangle ABC is a right triangle with altitude CD. Prove: AB AC AC AD and AB BC BC BD A D B Solve for a, b, and c c 1 b a Chapter Assignments 101
16 9. a b c You are standing 1 feet from a tree. Your line of sight to the top of the tree and to the bottom of the tree forms a 90-degree angle as shown in the diagram. The distance between your line of sight and the ground is feet. Estimate the height of the tree. x 1 ft ft 102 Chapter Assignments
17 Assignment Assignment for Lesson.6 Name Date Indirect Measurement Application of Similar Triangles 1. You want to measure the height of a tree at the community park. You stand in the tree s shadow so that the tip of your shadow meets the tip of the tree s shadow 2 meters from where you are standing. The distance from the tree to the tip of the tree s shadow is.4 meters. You are 1.2 meters tall. Draw a diagram to represent the situation. Then find the height of the tree. Chapter Assignments 103
18 2. You and a friend are making a banner to hang between the apartment buildings, across the street. You each are on the 10th floor of apartment buildings that are directly across the street and have balconies. To hang the banner, you and your friend need to attach it to hooks on the wall of each balcony. The wall of your balcony is 6 feet away from the street and the wall of your friend s balcony is 4 feet away from the street. You also know that your friend s balcony is 10 feet away from the end of his building and your balcony is 100 feet away from the edge of your building. How wide is the street between you and your friend s apartment buildings? How long does the banner need to be? Show all your work and use complete sentences in your answer. 10 ft 4 ft 6 ft 100 ft 104 Chapter Assignments
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