Encarta: Pythagoras
- Encyclopedia article provides an introduction to the Greek philosopher and mathematician.
- http://encarta.msn.com/encyclopedia_761563435/Pythagoras.html

Pythagoras
- Student-written biography focuses on his most significant achievements.
- http://library.thinkquest.org/4116/History/pythagor.htm

The Theorem of Pythagoras
- Brief description and proof of the Pythagorean theorem.
- http://www-spof.gsfc.nasa.gov/stargaze/Spyth.htm

The Proof: Pythagorean Puzzle
- A fun look at the man and one of his best-known equations. Includes Shockwave demonstration. From Nova Online.
- http://www.pbs.org/wgbh/nova/proof/puzzle/

Pythagoras of Samos
- Detailed biography, including pictures, from the MacTutor History of Mathematics archive.
- http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Pythagoras.html