All polygons have an interior angle sum of 180(n-2) degrees where n is the number of sides.
180(9-2)=180*7=1260 degrees
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The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees. 6660 degrees.
The sum of the exterior angles of all polygons equals to 360⁰.Since only the sum of the interior angles of all quadrilaterals equals to 360⁰, the polygon must have 4 sides.
The sum of the interior angles of a polygon with n sides is (n-2)*180 degrees. Here, n = 27, so the sum of the interior angles is (27-2)*180 = 25*180 = 4500 degrees.
The sum of the interior angles would be (36-2)180 degrees=6120 degrees.