The ping-pong method to constructe nonconconstructive polygon

I had post the self accurate method for most nonconstructive regular polygon which less than 25. the method can be remember easily by ping-pong. that is: start from one angel, if the angel is odd number, then find a bisector at another side(cross the center of the circle.);calculate the divided number, if the number is even, then bisector at same side,till the number is odd, if it is not 1, then continue, if it is 1,then stop. It is one circle. you can continue many circles if you want very accurate number.