Leonardo da Vinci (1452-1519) was a great lover of geometry. His most outstanding polyhedral accomplishment is the illustrations for Luca Pacioli's 1509 book The Divine Proportion.
Jenn 3D is a free software license program for visualizing regular polytopes in stereographic projection.
Click the figure below to see the index.
Da Vinci dodecahedron and Jenn 3D tool
Thursday, December 17, 2009