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OpenStudy (anonymous):
The sum of the measures of the interior angles of a regular polygon is 1980. Find the number of sides in the polygon.
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OpenStudy (anonymous):
(n-2) x 180= 1980 Distribute 180n-360=1980 Add 360 to both sides 180n=2340 Divide both sides by 180 n=13 So you have 13 sides in this polygon.
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