きゅうかくけい
九角形
1. nonagon; enneagon; nine-sided polygon
2. NonagonIn geometry, a nonagon /ˈnɒnəɡɒn/ is a nine-sided polygon. The name "nonagon" is a prefix hybrid formation, from Latin (nonus, "ninth" + gonon), used equivalently, attested already in the 16th century in French nonogone and in English from the 17th century. The name "enneagon" comes from Greek enneagonon (εννεα, "nine" + γωνον), and is arguably more correct, though somewhat less common. A regular nonagon has internal angles of 140°.
Read “Nonagon” on English Wikipedia
Read “九角形” on Japanese Wikipedia
Read “Nonagon” on DBpedia
Read “Nonagon” on English Wikipedia
Read “九角形” on Japanese Wikipedia
Read “Nonagon” on DBpedia
Discussions
Log in to talk about this word.