Polygon shapes names9/24/2023 ![]() (Unicorns don’t exist, but they still have a name. Oh - I also promised a discussion of two-sided polygons, didn’t I? Most people think they don’t exist, so they don’t need to be named. 14,900 hits for “hendecagon” 12,400 for “undecagon.” Hooray!.Although the term “enneagon” is perhaps preferable (since it uses the Greek prefix and suffix instead of the mixed Roman/Greek nonagon), the term “nonagon,” which is simpler to spell and pronounce, is used in this work.Įven though counting Google hits is a useless way to decide these issues, let’s check them out just for fun: The nonagon, also known as an enneagon, is a 9-sided polygon. On their other page, however, they make this observation: Somewhat similarly, but worse, the 9-sided polygon is listed in both the Greek form, enneagon, and the hybrid, nonagon - but here Mathworld oddly prefers the Latin-Greek hybrid to the pure Greek.The term “hendecagon” is preferable to the other two since it uses the Greek prefix and suffix instead of mixing a Roman prefix and Greek suffix. In fact, another Wolfram Mathworld page makes this observation:Ī hendecagon is an 11-sided polygon, also variously known as the undecagon or unidecagon. ![]()
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