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OpenStudy (anonymous):
what is the measure of the interior angles of a 20-gon
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OpenStudy (elonasushchik):
Medal for this and fan.
OpenStudy (elonasushchik):
or, using the exterior angles... the exterior angles add to 360 for any polygon 360 / 20 = 18 degrees per exterior angle the interior and exterior angles are supplementary, so 180 - 18 = 162 degrees per interior angle:
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