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Problems in Polygon
1) If the interior angle of a regular polygon is xo and the exterior angle is (3x-100) ͦ / 8, find the value of x.
190 ͦ
130 ͦ
170 ͦ
140 ͦ
1/10
Solution
Answer:
140 ͦ
Explanation:
(x + (3x - 100) / 8) = 180
8x + 3x - 100 = 180
8x + 3x - 100 = 1400
11x = 1540
x = 140⁰
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