# Roulette (Epitrochogon) of a Regular Polygon Rolling around Another Regular Polygon

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An epitrochogon is the trace (roulette) of a point attached to a polygon rolling without slipping around the outside of another polygon [1].

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Contributed by: Erik Mahieu (April 2017)

Open content licensed under CC BY-NC-SA

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Reference

[1] T. M. Apostol and M. A. Mnatsukanian, "Generalized Cyclogons," *Math Horizons*, 10(1), 2002, pp. 25–28. www.mamikon.com/USArticles/GenCycloGons.pdf.

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