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pentadecagon
[ pen-tuh-dek-uh-gon, -guhn ]
noun
, Geometry.
- a polygon having 15 angles and 15 sides.
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Word History and Origins
Origin of pentadecagon1
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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.
From Project Gutenberg
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