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Triangular Numbers in Problem Solving

Walter Szetela 

December 1999, Volume 92, Issue 9, Page 820

Abstract:
A surprising number of mathematics problems have solutions that involve triangular numbers. This article gives some of these problems, as well as many of their interesting extensions. It also suggests other extensions for further investigation.

Keywords:
Article
Grades 9-12
Teacher
Problems
Problem Solving / Problem Posing