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The sum of the interior angles of a n-gon is (n-2)*180 degrees.

So the sum of the interior angles of a 15-gon would be (15-2)*180 degrees = 2340 degrees.

If the 15-gon is regular then all its interior angles are equal. In that case, each would be 2340/15 = 156 degrees.

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15y ago

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