20 Oct
2014
20 Oct
'14
8:18 p.m.
Yesterday, without telling him http://www.mathpuzzle.com/21oct02.html, I challenged Nico Brown, http://mathcircle.berkeley.edu/images/nico-vincent-bmmt.JPG (left, here winning the Berkeley Mini-Math Tournament) to find such a dissection. I think there were only three known. He just found the fourth: https://mail.google.com/mail/?ui=2&ik=97b2a014c7&view=att&th=149301580b6c08d... --rwg