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Proof without Words: Squares of Triangular Numbers

The author proves visually that the square of the \(n\)th triangular number equals the sum of the cubes of the first \(n\) positive integers.

Old Node ID: 
3625
MSC Codes: 
97G40
Author(s): 
Roger B. Nelsen (Lewis and Clark College)
Publication Date: 
Monday, January 31, 2011
Original Publication Source: 
Mathematics Magazine
Original Publication Date: 
June, 1990
Subject(s): 
Geometry and Topology
Geometric Proof
Numbers and Computation
Patterns and Sequences
Number Patterns
Flag for Digital Object Identifier: 
Publish Page: 
Furnished by JSTOR: 
File Content: 
Rating Count: 
37.00
Rating Sum: 
109.00
Rating Average: 
2.95
Applicable Course(s): 
3.7 Discrete Math
4.1 Introduction to Proofs
4.10 Math for High School Teachers
Modify Date: 
Monday, January 31, 2011
Average: 2.8 (40 votes)

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