720 degrees is right because

a square has 360 degrees,a pentagon has 540..so the pattern is adding 180 each sides..

So a hexagon(with 6 sides)equals 720 degrees..

I wish that helped^^

a square has 360 degrees,a pentagon has 540..so the pattern is adding 180 each sides..

So a hexagon(with 6 sides)equals 720 degrees..

I wish that helped^^