Page "56 (number)" Paragraph 5

Plutarch states that the Pythagoreans associated a polygon of 56 sides with Typhon and that they associated certain polygons of smaller numbers of sides with other figures in Greek mythology.

While it is impossible to construct a perfect regular 56-sided polygon using simple ' square and circle ' geometry, a close approximation has recently been discovered which it is claimed might have been used at Stonehenge.