-12
Pythagoras' Law?
(lemm.ee)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
Math laws are basically axioms, which means Assumptions we hold to be true.... meaning they are unprovable, if you could prove them from other axioms, then they would be theories and you wouldn't have to make a new assumption.
Everything else is built up on the assumptions and are called theories, assuming the axioms are correct.