Is the sum of the angles of any polygon 1600??How about 900?? This question has not been answered yet! Don't worry! You can check out similar questions with solutions below proof of sum of interior angles of a polygon ????????? Find the sum of interior angles of a polygon of 22 sides. Sum of Interior angles of a polygon with ( x- 2 ) sides ... find the sum of interior angles of a polygon with 7 sides Find the sum of interior angle of a polygon with 9 sides