# A One-Sentence Proof That $\sqrt 2$ Is Irrational

by David M. Bloom (Brooklyn College of CUNY)

Mathemtics Magazine
October, 1995

Subject classification(s): Numbers and Computation | Number Concepts | Irrational Numbers
Applicable Course(s): 2.1 College Algebra | 3.7 Discrete Math | 4.1 Introduction to Proofs

This is an algebraic version of geometric argument given by Eves that the $\sqrt 2$ is irrational.

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