A pentagon
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For a regular polygon with sides n, the sum of the interior angles = (n-2)180Therefore, a regular polygon has interior angle sum equal to 540o.(5-2)180=(3)180=540
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(n-2)(180) use that formula to find the sum of the interior angles of a polygon in degree
The question has been asked "What is the angle sum of a thirteen sided polygon?" The answer to this question is 1980 degrees. The sum of the interior angles of a polygon of n sides = 180(n - 2)
Anything you like. Any single interior angle of a polygon is indeterminate - the only constraint is on the sum of all the interior angles.