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# a geometric proof that \sqrt{2} is irrational

## Question

PlanetMath already has a couple of number-theoretic proofs that 2 is irrational. Wikipedia has a geometric proof of this using Pythagorasâ€™ theorem. It would be nice for PM to have this or any geometric proof stylistically similar to what Pythagoras himself would have come up with.

This ought to be attached to SquareRootOf2. I think both a number theory MSC 11-xx and a geometry MSC 51-xx apply here.

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## Info

Submitted by: CompositeFan

Added: 2007-08-19 - 18:41

Added: 2007-08-19 - 18:41

## Versions

(v1) by CompositeFan 2013-03-09

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