“The Polygonal Playground.” Charming Proofs: A Journey into Elegant Mathematics, by Claudi Alsina and Roger B. Nelsen, 1st ed., vol. 42, Mathematical Association of America, 2010, pp. 51–70, www.jstor.org/stable/10.4169/j.ctt6wpwnz.8. Accessed 29 May 2020.
Alsina, C., & Nelsen, R. (2010). The Polygonal Playground. In Charming Proofs: A Journey into Elegant Mathematics (pp. 51-70). Mathematical Association of America. Retrieved May 29, 2020, from www.jstor.org/stable/10.4169/j.ctt6wpwnz.8
Alsina, Claudi, and Roger B. Nelsen. "The Polygonal Playground." In Charming Proofs: A Journey into Elegant Mathematics, 51-70. Mathematical Association of America, 2010. Accessed May 29, 2020. www.jstor.org/stable/10.4169/j.ctt6wpwnz.8.
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