Tracery Window 8

This design is based on inscribing 8 semi circles inside a circle. Easier to construct with pencil and a pair of compasses, because I could not find a way of setting the diameter of the compass on Cabri. Again the arc function was used by eye, which lacked the finesse and satisfaction of using a pair of compasses. However it was fun to use Cabri, exploring most efficient ways of using the functions.