Decagon definition

dĕkə-gŏn
A polygon with ten sides and ten angles.
noun
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A polygon with ten sides and ten angles.
noun
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A polygon having ten sides.
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(geometry) A polygon with ten sides and ten angles.
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Other Word Forms

Noun

Singular:
decagon
Plural:
decagons

Origin of decagon

  • Medieval Latin decagōnum from Greek dekagōnon from neuter of dekagōnos having ten angles deka ten dekm̥ in Indo-European roots -gōnos angled –gon

    From American Heritage Dictionary of the English Language, 5th Edition

  • deca- +‎ -gon

    From Wiktionary