Review Of Interior Angle Of A Regular Hexagon References. What degree angle is an octagon? All the interior angles in a regular polygon are equal.
So, sum of interior angles of a hexagon = 4 * 180 = 720 and each interior angle will be 120. It is made up of six equilateral triangles. As the interior angles of a regular hexagon are equal, the measure of each can be determined as 7200/6.