In a regular polygon the exterior angle is 8 times of its interior angle find
(a) exterior angle
(b) Interior angle.
(c) no of sides.
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interior angle = x
exterior angle = 8x
sum = x + 8x = 180
9x=180
therefore x=20 degree
INTERIOR ANGLE=20 DEGREE
EXTERIOR ANGLE=160 DEGREE
NO. OF SIDES =2(1+8)=2(9)=18
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