Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of decagon is as below...

Decagonal :: Decagonal (a.) Pertaining to a decagon; having ten sides.

Hendecagon :: Hendecagon (n.) A plane figure of eleven sides and eleven angles.

Endecagon :: Endecagon (n.) A plane figure of eleven sides and angles.

Dodecagon :: Dodecagon (n.) A figure or polygon bounded by twelve sides and containing twelve angles.

Undecagon :: Undecagon (n.) A figure having eleven angles and eleven sides.

Decagon :: Decagon (n.) A plane figure having ten sides and ten angles; any figure having ten angles. A regular decagon is one that has all its sides and angles equal.

Quindecagon :: Quindecagon (n.) A plane figure with fifteen angles, and consequently fifteen sides..

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