Drawing 3. Figure 3.6. Bisect (by p2) the angle q (BOH), subtended by this intersection, at H, and the vertex J. This angle is very nearly 102.8571°, and bisected, it yields, very nearly, 51.4285°, one of the seven angles of the heptagon. (We will discuss these angles in the proof.) Do the same bisection on the other side of the circle, at IOB. | back to Geometer's Angle No. 4 |