Pythagoras tiling
Bill Casselman writes about the intriguing amateur mathematician Henry Perigal, who took his elegant proof of Pythagoras' Theorem literally to his grave - by having it carved on his tombstone.
© 1997-2009, Millennium Mathematics Project, University
of Cambridge.
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Permission is granted to print and copy this page on paper for non-commercial use. For other uses, including electronic redistribution, please contact us.
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