Please click here if you are not redirected within a few seconds.

Go back to previous page
Forum URL:	http://www.cut-the-knot.org/cgi-bin/dcforum/forumctk.cgi
Forum Name:	This and that
Topic ID:	735
Message ID:	0
#0, Question on CTK article on Regular Polyhedra Posted by Abi Kirk on Oct-18-06 at 02:04 PM In the cTK article Regular Polyhedra, Alexander Bogomolny discusses Euler's Formula. He remarkds that it was first proved by Descartes in 1639. I would be grateful if he or anyone could give me a reference for this; I haven't been able to find anything on-line about Descartes' proof. Many thanks, Abi Kirk.