the ratio between an exterior angle and interior angle of a regular polygon is 1:8 find the number of the sides in the polygon
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Answer:
The correct answer is 18 sides
Step-by-step explanation:
1:8=9 (x + 8x =9x)
9x = 180
x = 180 / 9
x = 20
exterior angle 20°
interior angle 8 × 20 = 160
sides of polygons = sum of exterior
angle / exterior angle
360 / 20 = 18 sides
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