If the measure of the interior angle of a regular polygon is 90 deg greater than the measure of its exterior angle, then how many sides does it have ?
A) 8 B) 9 C) 10 D) 12
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Answer:
answer is 4
(n-2)180/n=90
180n-360=90n
180n-90n=360
90n=360n
n=360/90
n=4
wrong options
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