How to determine the sum of all interior angles of a polygon ex 1

The video tutorial explains how to find the sum of the interior angles of a quadrilateral. It begins by discussing the method of dividing a quadrilateral into triangles, each with an interior angle sum of 180 degrees, leading to a total of 360 degrees for the quadrilateral. The tutorial also introduces a formula for calculating the sum of interior angles based on the number of sides, demonstrating its application to quadrilaterals. The video emphasizes that the sum remains constant regardless of whether the quadrilateral is regular or irregular.

What formula is used to calculate the sum of the interior angles of a polygon?

Describe the process of drawing a figure to find the sum of interior angles.