
 Draw circle O.
 Draw AB, the diameter of circle O.
 Divide AB into 9 parts.
 Draw a circle at A and B, each with radius AB. They cross each other at C.
 Find D, the second point from the left on AB.
 Draw a line through points C and D.
 CD crosses circle O at point E. Points A and E are points of the nonagon. Use them
to find the rest!
