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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): 
Geometric Proof
Geometry and Topology
Number Patterns
Patterns and Sequences
Numbers and Computation
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): 
4.10 Math for High School Teachers
4.1 Introduction to Proofs
3.7 Discrete Math
Modify Date: 
Monday, January 31, 2011
Average: 3 (37 votes)

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