If you're looking for a brief summary of the Elements, see the page about Euclid.
Several of the proofs given in Euclid's Elements are available on the Math Lair. They are:
Book I | Book II | Book IX |
---|---|---|
Definitions, Postulates, and Common Notions | Definitions | Proposition 20 |
Proposition 1, Proposition 3, | Proposition 14 | Proposition 36 |
Proposition 5, Proposition 6, | ||
Proposition 29, Proposition 47 |