> Trisecting the angle: Dividing a given angle into three smaller angles all of the same size. Unless you allow an infinite number of steps. The limit of the s

> Trisecting the angle: Dividing a given angle into three smaller angles all of the same size. Unless you allow an infinite number of steps. The limit of the series 1/2 - 1/4 + 1/8 - 1/16... is 1/3 so you can get to it by repeatedly bisecting angles. Your paper will look quite messy after an infinite number of steps however.