Many ancient designs were constructed by dividing circles into either eight or six parts as the procedures for circle division using only a compass and straight edge are relatively straight forward. After becoming familiar with these two procedures, I wondered if it was possible to divide a circle into five parts with only a compass and straight edge. It turns out it is and this video tutorial is easy to follow.
There are a few more steps required for dividing a circle into five parts, but the procedure was easy enough for my seven year old to follow after spending several weeks creating circles divided into six and eight parts.
Once a circle is divided into five, the angles can be easily bisected to
create ten sections. We divided our circles into ten and then created
our own mandalas.
Math Page for more ideas.