Normally, I spend the third week of the month discussing a practical application of a cool mathematical concept. However, my post from last week fit that standard perfectly. So, I chose to give you a practical use of the Pythagorean Theorem, but less on a applicable level and more on a personal level. This is an identity that can be turned into a puzzle for your friends. It can also be used as a proof of the Pythagorean Theorem. Enjoy!