Monday
March 30, 2015

Homework Help: Math

Posted by Marie on Monday, February 15, 2010 at 1:26am.

A triangular number is a number that can be represented by dots arranged in a triangular shape. The first four triangular numbers are 1, 3, 6, 10. What is teh 10 triangular number? The 20th? The 100th?

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