Answer Key Lesson 7.1 Study Guide 1. leg; 30 2. hypotenuse; 3 Ï } 13 3. hypotenuse; 52 4. leg; 20 Ï } 6 5. leg; 5 Ï } 3 6. hypotenuse; 39 7. 1452 yd 2 8. 540 mi 2 9. 5, 12, 13; 130 cm 10. 7, 24, 25; 96 in.
Answer Key Lesson 7.2 Study Guide 1. right triangle 2. right triangle 3. not a right triangle 4. yes; right 5. yes; obtuse 6. yes; acute 7. yes; obtuse 8. yes; obtuse 9. yes; right
Answer Key Lesson 7.3 Study Guide 1. 336 } 25 2. 540 } 51 3. 4 Ï } 5 4. 5 Ï } 6
Answer Key Lesson 7.4 Study Guide 1. 9 2. 30 3. 25 Ï } 2 4. 12 Ï } 3 5. 26 6. 21 7. 10 8. 62
Answer Key Lesson 7.5 Study Guide 1. tan A < 0.9524; tan B 5 1.05 2. tan A < 5.4545; tan B < 0.1833 3. 68.6 4. 17.4 5. x 5 3 Ï } 3 ; x < 5.2; the results are the same.
Answer Key Lesson 7.6 Study Guide 1. sin A < 0.2195; sin B < 0.9756 2. sin A < 0.8349; sin B < 0.5505 3. cos A < 0.5283; cos B < 0.8491 4. cos A < 0.5077; cos B < 0.8615 5. 8.4 6. 48.3
Answer Key Lesson 7.7 Study Guide 1. 66.08 2. 31.08 3. 71.88 4. 13.38 5. 83.18 6. 47.98 7. angle measures: 298, 618, 908; side lengths: 21, 37.9, 43.3 8. angle measures: 238, 678, 908; side lengths: 6.4, 15, 16.3