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decagon

noun

🔊/ˈdekəɡən/

🔊/ˈdekəɡɑːn/

(geometry几何)

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a flat shape with ten straight sides and ten angles十边形；十角形 compare decahedronTopics Colours and Shapesc2
Word Originmid 17th cent.: via medieval Latin from Greek dekagōnon, neuter (used as a noun) of dekagōnos ‘ten-angled’.