The formula is that famous one parodied by the joke with a punch line something like "the squaw of the hippopotamus is equal to the sum of the squaws of the other two hides." That is, the square of the hypotenuse is equal to the sum of the squares of the other two sides. This is the Pythagorean Theorem showing the relationships among the three sides of a triangle with a 90 degree corner,

Ernie,

Maybe next time you will have to just quote the version the Tin Man used in Wizard of OZ.

-Don