Euclid, the one from Alexandria, is the Father of Geometry. Being that math is math and fundamentally hasn’t changed, his work is still taught all over the world. So you could say hes a pretty influential guy, especially when you think he lived over 2000 years ago.

In his book ‘Elements’ he put forth 5 common notions
1- Things that are equal to the same thing are also equal to one another (Transitive property of equality).
2- If equals are added to equals, then the wholes are equal (Addition property of equality).
3- If equals are subtracted from equals, then the remainders are equal (Subtraction property of equality).
4- Things that coincide with one another are equal to one another (Reflexive Property).
5- The whole is greater than the part.

We liked the play on words that came from ‘The whole is greater than the part and the hole is less than the part’, if you don’t see the humor read it out loud, if you still don’t see the humor try drilling a hole larger than the part.