noun
- plural of nonagon; nine-sided polygons
Usage: geometry
Examples
- The students drew several nonagons on their geometry worksheets.
- Regular nonagons have nine equal sides and nine equal angles.
- The architect incorporated nonagons into the building’s decorative pattern.
- Nonagons are less common than triangles or squares in everyday design.
- Each interior angle of a regular nonagon measures 140 degrees.
- The math teacher explained how to calculate the area of nonagons.