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1. Oxford Dictionary

   decagon

   • IPA[ˈdɛkəɡ(ə)n]

   英式

   • n.
     a plane figure with ten straight sides and angles.

   • noun: decagon, plural noun: decagons

2. • 更多解釋

   decagon

   • IPA[ˈdekəˌɡän]

   美式

   • n.
     a plane figure with ten straight sides and angles.

   Oxford American Dictionary