Back to Lesson 9-2 Answer Page Name 9-2B 0-0X Lesson Master Questions on SPUR Objectives See Student Edition pages 578–583 for objectives. SKILLS Objective A In 1–6, find the area. 2. 3. 4m 7 in. 12 cm 6m 10 in. 5 cm 4. 20 ft 15 ft 5. 6. 6 in. 45 cm 20 cm 1. 4.5 in. 7. Below are three copies of the same triangle. Find the area of each. 5 3 4 4 3 5 5 3 4 8. 15 feet, 20 feet, and 25 feet 9. 10 inches, 24 inches, and 26 inches 10. 34 centimeters, 30 centimeters, and 16 centimeters 11. 19.5 inches, 18 inches, and 7.5 inches 456 Copyright © Wright Group/McGraw-Hill In 8–11, find the area of a right triangle with the given side lengths. Pre-Transition Mathematics SMP_TRPTM_C09_452-482.indd 456 4/24/08 5:30:18 PM Back to Lesson 9-2 Answer Page Name 9-2B page 2 SKILLS Objective J 12. Mr. Hobson teaches kindergarten. He is cutting rectangles from sheets of construction paper. The rectangles measure 4 inches by 6 inches. He will then cut each rectangle into two identical right triangles for his students to use as sails on paper sailboats. a. What is the area of one sail? b. What are the base length and height of that sail? c. If he were to use poster board that is 16 inches by 48 inches, how many sails can he cut out that are the same size as the one described in Part b? House 25 ft 13. Martha made a triangular garden in front of her house. The dimensions of the garden are shown. Garden alk tw on Fr 16 ft a. Find the area of the triangular garden. b. Martha wants to use __14 of the area for some evergreen bushes. How many square feet will be for evergreens? c. Three-eighths of the garden will be for lilac bushes. How many square feet will be for lilacs? d. The remaining area will be for day lilies and petunias. How much area is left for these ﬂowers? Copyright © Wright Group/McGraw-Hill 14. For a pep rally, the cheerleaders want to make a large pennant with the dimensions shown. In order to make the pennant, they will buy a rectangular piece of material with dimensions 10 ft by 24 ft, and then cut away two identical right triangles from the top and bottom of the right side of the rectangle. 10 ft 24 ft a. What is the area of the rectangular piece of material? b. What is the area of the pennant? c. What are the areas of the two right triangles that have to be cut away? Pre-Transition Mathematics SMP_TRPTM_C09_452-482.indd 457 457 4/24/08 5:30:36 PM