This is an informal exploration of figurate numbers that was sparked by an architect and the number 575. It is intended as a topic that would be appropriate for mathematics in a High School.
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Baker, John E.
Spreadsheets in Education (eJSiE):
1, Article 2.
Available at: http://epublications.bond.edu.au/ejsie/vol9/iss1/2