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The measure of an interior angle of a regular n-gon is 140 degree. How many sides are in the regular polygon?
13 years ago

Answers

Reiny
let the number of sides be n

180(n-2)/n = 140
180n - 360 = 140n
40n = 360
n = 9

9-sided regular polygon, a nonagon
13 years ago

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