Pre-Calculus Homework Solutions 246

Pre-Calculus Homework Solutions 246 - 51. B; the perimeter...

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51. B; the perimeter p is equal to the sum of the measures of the sides. Find y. 2 x 1 2 y 5 ¬ p 2 1 } 5 y } 2 1 2 y 5 ¬ p } 2 5 } y 1 2 y 5 ¬ p } 1 5 2 y } 5 ¬ p y 5 ¬ } 5 1 p 2 } Page 416 Maintain Your Skills 52. Use the Interior Angle Sum Theorem. S 5 180( n 2 2) 5 180(14 2 2) 5 2160 The sum of the measures of the interior angles of a 14-gon is 2160. 53. Use the Interior Angle Sum Theorem. S 5 180( n 2 2) 5 180(22 2 2) 5 3600 The sum of the measures of the interior angles of a 22-gon is 3600. 54. Use the Interior Angle Sum Theorem. S 5 180( n 2 2) 5 180(17 2 2) 5 2700 The sum of the measures of the interior angles of a 17-gon is 2700. 55. Use the Interior Angle Sum Theorem. S 5 180( n 2 2) 5 180(36 2 2) 5 6120 The sum of the measures of the interior angles of a 36-gon is 6120. 56. Since the measures of two sides and the included angle are known, use the Law of Cosines. a 2 5 b 2 1 c 2 2 2 bc cos A a 2 5 11 2 1 13 2 2 2(11)(13) cos 42° a 5 Ï 11 2 1 w 13 2 2 w 2(11) w (13) co w
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