# Proof without Words: Sum of Integers

by Ian Richards (University of Minnesota)

Mathematics Magazine
March, 1984

Subject classification(s): Integers | Number Theory | Algebra and Number Theory
Applicable Course(s): 4.3 Number Theory

A visual derivation of the formula for the sum of the first $$n$$ integers is presented.

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.