The sum of all but one interior angle of a heptagon is 776°. The final angle must have a measure of _____ degrees. read more
If the hexagon is regular, the measure of each interior angle is 120 degrees. If the hexagon is convex the total is 720 degrees. This can be figured in a few ways: A regular hexagon is 6 equilateral triangles. Each interior angle is where two equilateral triangles touch. Each angle in an equilateral triangle is 60 degrees. And 60 + 60 = 120. read more