Question 235608
The sum of the interior angles of a polygon are given by the formula:


(n-2) * 180


n is the number of sides of the polygon.


Triangle = 3 - 2 = 1 * 180 = 180


Quadrangle = 4 - 2 = 2 * 180 = 360 (rectangle, square, Parallelogram, etc).


Pentagon = 5 - 2 = 3 * 180 = 540


hexagon = 6 - 2 = 4 * 180 = 720


etc.