Here’s how the new tetrahedron-based design for the “Trionda” soccer ball may affect next year’s big game

The point of concurrence of the joins of the vertices of a triangle and the points of contact of an inconic of the triangle (Veblen and Young 1938, p. 111; Eddy and Fritsch 1994). The Brianchon point ...

YouTube video by Dom Puzzles

Pythagoras’ Theorem seems to be a concept that can be taught in an endless number of different ways!  I must have re-invented the way that I’ve taught this topic several times.  I’ve also…