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pentadecagon

[ pen-tuh-dek-uh-gon, -guhn ]

noun

, Geometry.
  1. a polygon having 15 angles and 15 sides.


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Word History and Origins

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Example Sentences

That observer had said that the obliquity corresponded to the side of a pentadecagon, or fifteen-sided figure, which is equivalent in modern phraseology to twenty-four degrees of arc.

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