Counting Triangles
Library Home 
Full Table of Contents 
Suggest a Link 
Library Help
http://www.cuttheknot.org/Curriculum/Algebra/NSquared.shtml  


Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny  
Division of a square by evenly spaced lines parallel to its sides yields a number of small squares which is clearly square. Interestingly, the same is true for a triangle divided by evenly spaced lines parallel to its sides. The page contains a dynamic illustration of this result and a demonstration that it is equivalent to the well known fact that the sum of a series of odd numbers is a square.  


Levels:  High School (912), College 
Languages:  English 
Resource Types:  Graphics, Web Interactive/Java 
Math Topics:  Basic Algebra 
[Privacy Policy] [Terms of Use]
© 1994 Drexel University. All rights reserved.
http://mathforum.org/
The Math Forum is a research and educational enterprise of the Drexel University School of Education.