It's the Pythagorean theorem put into context with reality. The left triangle is three bottom is 4 and top is 5. Ask any carpenter and they'll refer to the Pythagorean theorem as a 3,4,5.

Ancient Free and Accepted Masons (AFAM) adhere to the "ancient teachings". The "footwork" and other rituals involve sacred geometry at its core (that is what I believe).

It is interesting at the very least. I've been studying for 20 years now.