The sum of the interior angles of an n-gon is (n-2)*180 degrees.
If the n-gon is regular, its n angles are equal and in that case, each is (n-2)*180/n degrees.
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It is the formula for finding the sum of the interior angles of a polygon:- (s-2)*180 = sum of interior angles
(number of sides-2)*180 = sum of interior angles
If it's a quadrilaterl shape then the 4 interior angles will add up to 360 degrees in compliance with the formula: (number of sides-2)*180 = sum of interior angles
The sum of the interior angles of a polygon with n sides is (n-2)*180 degrees.
540 degrees according to the formula: 180(n-2)