Lesson 3-1 Measuring Angles 1. 30 2. 140 3. acute 4. IV 5. x 35 6. x 5 7. 20 ; acute; NAK 8. x 15; answers will vary. 9. x 50 10. a. x 15 11. x 23 12. 3 13. a. 65 b. Read the inner scale of the protractor. 14. a. EAD b. 120 15. A 16. a. 95 b. Read the outer scale of the protractor. Lesson 3-2 Adjacent Angles 1. A, C 2. D 3. 79 4. 42 1 4 5. a. C b. 53 6. a. D b. 26 7. a. 36 8. a. 19 9. a. C, F, H 10. x 18 TOU 54 UOW 81 11. a. 49.3 b. 136 121.1 Lesson 3-3 Complementary Angles 1. A 2. a. C b. B, 30 3. 72 4. 6 5. a. D b. 8 6. a. 51 7. 37 8. C, D 9. 6 10. a. 4 b. 25 c. 65 Lesson 3-4 Supplementary Angles 1. C, D 2. 51.1 3. 42 4. B is 45 A is 135 5. a. 29 6. a. 116 b. A 7. 20 8. a. 50 b. 150 and 30 digits Texas 7 Grade 7
9. a. C b. 47 10. a. C b. 21 c. 84 Lesson 3-5 Vertical Angles 1. R and Y 2. LJP 3. a. KMT is vertical to VMJ. b. 3 4. 110 5. a. A, E b. 19 6. 8 7. a. 840 8. 23 9. a. C, D 10. 8 11. a. 135 b. 85 c. 45 d. 85 e. 50 f. 95 Lesson 3-6 Sum of the Angles in a Triangle 1. 37 2. 50 3. x 41 4. 30 5. 50 6. x 36; m Q 126 7. a. 61 8. a. 51 9. a. 35 10. 45 11. a. D b. 52.8 12. 40 13. 93.5 14. a. D b. 36.2 15. a. C b. m A 19.3 ; m B 77.2 ; m C 83.5 16. m A 93 ; m B 31 ; m C 56 Lesson 3-7 Additional Problem Solving 1. C, D 2. C 3. a. 35 b. B 4. A, D 5. a. y 20 b. x 160 c. x 158 6. a. 27 b. 146 7. a. A b. x 20; y 43 8. a. 60 b. 30 c. 90 d. 60 9. a. B 10. a. w 61 b. x 83 c. y 21 d. z 36 digits Texas 8 Grade 7
Lesson 4-1 Center, Radius, and Diameter 1. B 2. D 3. 10 cm 4. a. B b. 4 cm 5. 11.55 cm 6. a. C c. 2 7. a. 69.8 yd 8. a. A, F 9. a. B, D b. 1 10. 118 cm 11. a. C b. 9 12. a. D b. 6 Lesson 4-2 Circumference of a Circle 1. 7p cm 2. 24p mi 3. 62.8 ft 4. 59.66 cm 5. 8.6 cm 6. 15p cm 7. 3,082.2 ft 8. 9.42 ft 9. a. 9.4 ft b. The diameter triples; answers will vary. 10. a. 42p m, 56p m 11. a. 44p, 54p b. 10p or 31.4 12. a. 56.52 m b. C 13. 138.16 m 14. 42 ft 15. 6.28 in. 16. a. D b. 2.17 17. 12.57 ft 18. 3,768 flowers 19. 29 in. Lesson 4-3 Area of a Circle 1. 153.86 ft 2 2. 324p ft 2 3. 8,820.26 yd 2 4. a. C b. 64pm 2 5. 81p mm 2 6. 63.59 mm 2 7. 226.08 in. 2 8. a. Circle Y; 500.05 cm 2 9. a. 64p cm 2 10. a. 16p m 2 ; 64p m 2 b. 4 11. 392.5 yd 2 12. a. 12.56 in. 2 b. 17.19 in. 2 13. a. 12,544p miles 2 14. a. 86.55 ft 2 b. 12,462.66 in. 2 15. a. C b. $3,798.42 16. a. $254.34 b. 36 ft 2 digits Texas 9 Grade 7
Lesson 4-4 Areas of Semicircles and Quarter Circles 1. 18.15 cm 2 2. 3,617.28 yd 2 3. 1,133.54 ft 2 4. 34 ft 2 5. 149.50 cm 2 6. 132.67 m 2 7. a. 907.46 in. 2 b. B 8. a. The area of circle 2 is 25 times the area of circle 1. b. 800 cm 2 9. 896.80 cm 2 10. 1,959.36 ft 2 11. 22.89 in. 2 12. a. Answers will vary. b. about $2,216.78 13. 576 in. 2 14. a. 2,826 ft 2 b. 2% Lesson 4-5 Areas of Composite Figures 1. 6,962.5 m 2 2. 564 in. 2 3. 254.34 m 2 4. a. Answers will vary. 5. a. 6,469.32 m 2 6. a. Answers will vary. 7. 151.18 m 2 8. 1,254.24 ft 2 9. C 10. a. Area of a rectangle, triangle, and circle b. 218.36 cm 2 11. 370.93 in. 2 12. 3,086.75 cm 2 Lesson 4-6 Additional Problem Solving 1. 52p 2. 30.96 m 2 3. 460 ft 2 4. a. 86.34 in. 2 5. a. 288p units 6. 217 m 2 7. 326.56 cm 8. a. 51.39 ft 9. a. 52 in. b. You need to take the legs off and turn it sideways. 10. 35.80 cm 2 11. a. D b. 319.10 ft 2 12. a. C b. 428.4 m 13. a. 24 inches b. No 14. $116.67 Lesson 5-1 Nets 1. A 2. B 3. A 4. A 5. a. A b. A 6. a. C b. B 7. a. 1 base and 4 lateral faces b. Square pyramid 8. Pentagonal prism; answers will vary. digits Texas 10 Grade 7
Lesson 5-2 Surface Areas of Right Prisms 1. 386 in. 2 2. 3 8 in.2 3. a. B b. 240 4. 666 in. 2 5. a. B b. 254 6. 249.2 cm 2 7. a. 2,111.2 cm 2 b. The area of the net is equal to the area of the stone. 8. a. A b. 439.2 c. It has only one triangle, like the vase. 9. 8 27 Lesson 5-3 Volumes of Right Prisms 1. 30 cm 3 2. 29.791 m 3 3. 400 ft 3 4. 41.16 cm 3 5. 1,793 cm 3 6. 185,193 cubic feet 6,859 cubic yards 7. 3,572 m 3 8. 320 ft 3 9. 4,844 ft 3 10. a. A 11. a. D b. 5,351 cubic centimeters 12. a. D b. 3 ft by 4 ft by 3.5 ft 13. Freezer B 14. a. 264 cm 3 Lesson 5-4 Surface Areas of Right Pyramids 1. 560 m 2 2. a. 1,800 cm 2 b. A 3. a. Answers will vary. b. A, B, C, D 4. a. D b. 360 in. 2 5. a. 885 cm 2 b. 37,174.2 cm 2 6. a. B, C, D b. 397 yd 2 7. 579 m 2 ; answers will vary. 8. a. 177 cm 2 b. No 9. 104 m Lesson 5-5 Volumes of Right Pyramids 1. 45 cm 3 2. 60 cm 3 3. 688 cm 3 4. 66,170 cm 3 5. 10.8 cm 3 6. a. D 7. 6 m 3 8. a. 3,336.9 mm 3 b. C 9. a. 687.96 cm 3 b. A, B, D 10. A 11. 411,642 ft 3 ; 15,246 yd 3 12. 77 in. 3 13. a. D b. 363 ft 3 digits Texas 11 Grade 7
Lesson 5-6 Additional Problem Solving 1. 330 in. 3 2. 860 in. 2 3. a. C b. 1,512 cm 2 4. a. 48 ft 3 b. 64 ft 2 5. a. 1,057 ft 2 b. 1,081.44 ft 2 6. a. D b. Container G 7. 9 jars 8. Box R; answers will vary. digits Texas 12 Grade 7