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Definition of decagon

decagon

/ˈdɛk.ə.ɡɑːn/
dec · a · gon
Plural:decagons
•
Adjective:decagonal
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decagon Lexical Profile

decagon Game Scores & Validity

• noun

1

A plane geometric figure with ten straight sides and ten angles.

Example

"The geometry students calculated that the sum of the interior angles in a regular decagon is 1,440 degrees."

• Rhymes for decagon

• Nearby Words

decaffeinate
decaffeinated
decaffeination
decagon
decaisnea
decal
decameter

Word Origin & Etymology

Borrowed in the late 16th century via Medieval Latin decagonum from Ancient Greek dekágōnon, combining déka ('ten') and gōnía ('angle, corner').

Cite this Entry

Wordmom. (2026). Definition of Decagon. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/decagon
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