500? BC
Pythagorean Theorem Discovered
The Pythagoreans (followers of Greek philosopher and mathematician Pythagoras) discover the Pythagorean theorem, which states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.
Microsoft ® Encarta ® Reference Library 2005. © 1993-2004 Microsoft
Corporation. All rights reserved.
