`M. Gallant 1/99`

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The **Pythagorean Theorem** is probably the best known
theorem of basic geometry:*
The square of the hypotenuse of a right-angle triangle is
equal to the sum of the squares of the other two sides
*

Euclid in his **Elements** provided a somewhat complicated proof.
Many simpler proofs have been given since Euclid.
**The Pythagorean Proposition**, E.S. Loomis 1940 provides 370
proofs of this theorem!
The following two Java applets demonstrate two of the better known
geometrical proofs from antiquity of the Pythagorean Theorem:

References:

*Mathematical Recreations and Essays*,
W. W. Rouse Ball and H. S. M Coxeter, 13th Edn. Dover 1987, p. 88.
*A Bibliography of Recreational Mathematics*, W. L. Schaaf, V 4,
National Council of Teachers of Mathematics, p. 75.
*Dissections: Plane and Fancy*, G. Frederickson, Cambridge University Press, 1997.

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