nonagon
- noun
- /ˈnɒnəˌɡɒn/
- Specialized
:
nonágono
- A nonagon has nine sides.
Examples
-
The student drew a perfect nonagon for her geometry assignment.
-
The design on the floor was based on the shape of a nonagon.
-
A regular nonagon has equal sides and angles.
-
The nonagon is a fascinating shape in geometry.
-
A regular nonagon has equal sides and angles.
-
The design on the floor was based on the shape of a nonagon.
-
The student drew a perfect nonagon for her geometry assignment.
Synonyms
A flat shape with nine straight sides and nine corners
How Many Sides
Surface Forms
Morphology
nonagon = nona + gon
The word follows the regular polygon‑naming pattern (nona- 'nine' + -gon 'angle/side'), so the relationship is systematic, but the combining forms are not standalone English words and 'non-' could be misread as the negative prefix, making the formation only partially obvious to learners.
Etymology
Nonagon comes from two parts that mean 'nine' and 'angle'. The non- part is from an old word for 'nine' and the -gon part is the same as in hexagon and octagon, so a nonagon is a nine-sided, nine-angled shape.