Theorem 2 prove that the sum of the interior angles of pentagon is `540^@`.

Prove that sum of all the interior angles of a pentagon is 540^@ .

The sum of co interior angles is

The sum of all interior angles of a hexagon is

Sum of interior angles of polygon

Sum of the interior angles of a hexagon is __________.

Prove that the sum of the interior angles of an octagon is twice the sum of interior angles of a pentagon

The sum of the measure of the interior angles of a polygon is 540^(@) . Find the number of sides of the polygon.