I have very fond memories of high school geometry. Memorizing theorems wasn't too hard, and solving proofs was like solving the logic puzzles that I did for fun anyway. But the theorems were scattered ...

Do you remember being in school, working on algebra formulas, geometry theorems, and all sorts of math stuff, and wondering, "When will I EVER use this in real life? I'm pretty sure the adult me will ...

In ancient Greece, Euclid showed that if you agree on a small list of preliminary principles, or axioms, you can use deductive reasoning to reveal all sorts of new mathematical truths. But although ...