My math history class is currently studying non-Euclidean geometry, which means we've studied quite a few "proofs" of Euclid's fifth postulate, also known as the parallel postulate. If you're enjoying ...

Euclid’s Elements, which presented the state of the art in geometry around 300 B.C., has been extraordinarily influential. This massive, 13-volume compendium set the standard for mathematical ...

Some important points to revise from the chapter are: Some of Euclid’s axioms are: (1) Things which are equal to the same thing are equal to one another. (2) If equals are added to equals, the wholes ...