# 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.

A pdf copy of the article can be viewed by clicking below. Since the copy is a faithful reproduction of the actual journal pages, the article may not begin at the top of the first page.

These pdf files are furnished by JSTOR.

Classroom Capsules would not be possible without the contribution of JSTOR.

JSTOR provides online access to pdf copies of 512 journals, including all three print journals of the Mathematical Association of America: The American Mathematical Monthly, College Mathematics Journal, and Mathematics Magazine. We are grateful for JSTOR's cooperation in providing the pdf pages that we are using for Classroom Capsules.