
 Draw circle O. Find points A and B on circle O, so that OA __ OB.
 Find M, the midpoint of OB. Draw a circle at M, crossing A. Circle M crosses
OB at C and crosses OA at D.
 Draw a circle at A, crossing C. Circle A crosses circle O at points E and F.
 Points E, A, F, and D are points of the decagon. Use them to find the rest!
