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Math 7 Homework 4/12/2016 (even only) Name LESSON Date 10.1 Practice A For use with pages 537–541 Find the value of x. Then classify the triangle by its angle measures, acute, obtuse, or right. 1. 2. 51 3x Lesson 10.1 x 3. 2x 102 x 4. 3x x 3x 102 180 x 60 3x 34 (x 6) 5. The perimeter of an equilateral triangle is 45 meters. Find the length of each side. 6. The perimeter of an isosceles triangle is 34 feet. The length of one side is 14 feet. The lengths of the other two sides are equal. Find the lengths of the other two sides. Find the unknown side length of the triangle given the perimeter P. Then classify the triangle by its side lengths. 7. P 48 in. 8. P 65 yd 9. P 36 cm 25 yd 18 in. x 30 yd 10. The ratio of the side lengths of a triangle is 6 : 9 : 11. The perimeter of the triangle is 104 inches. Find the side lengths. Then classify the triangle by its side lengths. , , ; 11. The perimeter of a triangular window is 88 inches. The ratio of the side lengths of the window is 16 : 16 : 12. Draw and label a diagram of the window. What are the side lengths of the window? Classify the window by its side lengths. 122 Pre-Algebra IDEA! Works equilateral triangle — 3 congruent sides isosceles triangle — at least 2 congruent sides scalene triangle — no congruent sides Copyright © Holt McDougal Math. All rights reserved. Answers Lesson 9.8 9. regular octagon; convex 8. Practice A 5 12 5 1. sin A 1 ; cos A 13 ; sin B 13 ; 3 12 4 cos B 13 3 4 7 24 cos T 5 sin N 25 ; cos N 25 4. 0.3256 5. 0.2924 7. 0.9744 11. 94.4 3 6. 0.9962 8. 0.9986 12. 35.0 3. 0.5 9. 8.5 10. 13.4 13. 59 m 2. 65 1 3. 2, 2 6. x 12; y 122 7. x 83 ; y 16 10. 33.4 ft Standardized Test A, Chapter 9 1. A 2. C 3. B 4. A 5. B 6. B 7. C 8. A 9. C 10. C 12. A 5. 147 ft2 6. 15 m 8. 24 mm 9. 21 cm 32(tan 12°) 6.8 15. 4 11. B x 32 16. 60 Chapter 10 4. 108 yd2 7. 6 ft 10. 61 ft2 shade: 60 in.2; large style-B shade: 352 in.2; small style-B shade: 80 in.2 2. large style-B shade; 88 in.2 3. large frame: 48 in.; 5. $.90 small frame: 24 in. 4. $3 Practice A 1. 41 in. 2. 138 m Lesson 10.1 3. 151 ft 5. 7 ft, 14 ft 6. 11 m, 22 m 8. 380 mm2 9. 154 ft2 11. 35 m, 70 m 4. 377 yd 7. 254 cm2 10. 2462 m2 12. 29 ft, 58 ft 13. 38 ft 2 14. 1451 m Practice A Quiz 1 1. 43; acute 2. 19.5; obtuse 3. 20; acute or equiangular 4. 70; acute 5. 15 m 6. 10 ft 7. 15 in.; isosceles 8. 10 yd; scalene 9. 12 cm; equilateral 10. 24 in., 36 in., 44 in.; scalene 11. ; isosceles 32 in. 3. 18 cm2 Lesson 10.4 14. 6.8 feet; tan 12° ; 13. A 2. 30 ft2 1. large style-A shade: 264 in.2; small style-A 5. 2 9. 9.7 1. 32 m2 Problem Solving Workshop 3 4. 2, 2 8. 8.0 7 Lesson 10.3 Practice A Quiz 2 1. 5 square 2. sin S 5; cos S 5; sin T 5; 32 in. 1. 6 m, 6 m, 9 m 3. rhombus; 72 6. 324 m2 2. 30, 60, 90; right triangle 4. 28 in.2 7. 9 cm 8. 6 ft 5. 616 yd2 9. 42 mm Lesson 10.5 Practice A 1. 24 in. 7 cm Lesson 10.2 5 cm 7 cm Practice A 1. 12-gon; concave 3. parallelogram 6. 5 A18 2. octagon; convex 4. trapezoid 7. 42 Pre-Algebra IDEA! Works 5. rectangle 5 cm 13 cm 382 cm2 Copyright © Holt McDougal Math. All rights reserved.