### Pythagoras in 3-D: Two Ways! (TANTON Mathematics)

In this video we take Pythagoras's theorem and generalise it to a three-dimensional version in two ways. The first is the classic way as everybody does (which I am obligated to show, I guess) and the second is a snazzy not-well-known approach due to de Gua from the 1700s. Really cool!

Length:
10:30