What is the sum of the interior angles of a hexagon?
You can join an n sided polygon to any point in within the polygon. You will get n triangles. The sum of all the angles of any triangle is 180degrees. So you have n * 180 degrees, However n* 180 degrees has 360 degrees (the sum of the angles at the point chosen within the polygon). This should be minused. So you have an equation sum of total angles = n * 180 -360 = (n-2) * 180 In this case since n=2, you get sum of angles = 4*180 =720 degrees.
