nonagon
Sign in to saveIn geometry, a nonagon () or enneagon () is a nine-sided polygon or 9-gon.
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A nonagon is a shape with nine sides and nine angles, belonging to the family of polygons studied in geometry. While nonagons don't have major practical applications in everyday life, they're useful for understanding geometric principles and appear occasionally in design and mathematics.
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Article
10 sectionsContents
- Regular nonagon
- Construction
- Symmetry
- Tilings
- Graphs
- Architecture
- In popular culture
- See also
- References
- External links
In geometry, a nonagon () or enneagon () is a nine-sided polygon or 9-gon.
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 (from γωνία = "corner")), and is arguably more correct, though less common.