# Proof without Words: Algebraic Areas

by Shirley Wakin (University of New Haven)

This article originally appeared in:
Mathematics Magazine
September, 1984

Subject classification(s): Numbers and Computation | Measurement | Area
Applicable Course(s): 2.1 College Algebra

A visual proof of the identity
$(a+b)^2+(a-b)^2=2(a^2+b^2)$

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## Comments

### Proof without Words: Algebraic Areas

I made a different proof