1. In geometry, a theorem stating that in a right triangle, the square of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides (legs). If the hypotenuse is c units long and the lengths of the legs are a and b, then c2 = a2 + b2. The theorem provides a way of calculating the length of any side of a right triangle if the lengths of the other to sides are known.
2. Something the Scarecrow from The Wizard of Oz
was unable to correctly state even after he received his brains from the wizard.
-The Pythagorean Theorem? Who needs it? Some smart little preppy kid who's gonna save the world someday?
-Actually you need it to pass this geometry test asshole! If you don't pass this you stay back another year!