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109.11 Integer polygons containing 120°

Published online by Cambridge University Press:  17 February 2025

Chris Starr
Chris Starr*
Affiliation:
Kirkbie Kendal School, Lound Road, Kendal LA97EQ e-mail: czqstarr@gmail.com
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The Mathematical Gazette , Volume 109 , Issue 574 , March 2025 , pp. 147 - 151
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© The Authors, 2025 Published by Cambridge University Press on behalf of The Mathematical Association

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References

Read, Emrys, On integer-sided triangles containing angles of 120° or 60°, Math. Gaz. 90 (July 2006) pp. 299–305 CrossRefGoogle Scholar
https://en.wikipedia.org/wiki/Integer_triangle Google Scholar
https://www.letsthink.org.uk/wp-content/uploads/2014/10/Lesson-12-Roofs.pdf Google Scholar
Hardy, G. H. and Wright, E. M, An Introduction to the Theory of Numbers, (6th edn.) OUP (2008).CrossRefGoogle Scholar
Scharlau, Winfred and Opolka, Hans, From Fermat to Minkowski, Lectures on the Theory of Numbers and its Historical Development, Springer-Verlag New York (1985) pp. 7–8.CrossRefGoogle Scholar