1. OctadecagonAn octadecagon is a polygon with 18 sides and 18 vertices. Another name for an octadecagon is octakaidecagon.
Read “Octadecagon” on English Wikipedia
Read “十八角形” on Japanese Wikipedia
Read “Octadecagon” on DBpedia
Read “Octadecagon” on English Wikipedia
Read “十八角形” on Japanese Wikipedia
Read “Octadecagon” on DBpedia
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