Jisho

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じっかくけい 十角形
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Noun, Noun which may take the genitive case particle 'no'
1. decagon​
Wikipedia definition
2. Decagon​In geometry, a decagon is any polygon with ten sides and ten angles, and usually refers to a regular decagon, having all sides of equal length and each internal angle equal to 144°. Its Schläfli symbol is {10}.
Read “Decagon” on English Wikipedia
Read “十角形” on Japanese Wikipedia
Read “Decagon” on DBpedia
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十角形 【じっかっけい】

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