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nonagon

A plane geometric figure with nine straight sides and nine angles.
Noun
pl: nonagons

This term is primarily used in technical, mathematical, and architectural contexts. It describes a specific polygon, and while it is a precise geometric term, it is far less common in everyday conversation than terms like triangle or square.

In geometry, a nonagon is often referred to as an enneagon. While both terms are correct, nonagon is more frequent in general educational settings, whereas enneagon is often preferred in higher-level mathematics to maintain consistency with Greek numerical prefixes.

Meanings

Noun

A plane geometric figure with nine straight sides and nine angles.

The students were asked to calculate the interior angles of a regular nonagon.

Examples

A nonagon is a polygon with nine sides.

A nonagon is a polygon with nine sides.

School Life

The sum of the interior angles of a regular nonagon is 1260 degrees.

The sum of the interior angles of a regular nonagon is 1260 degrees.

School Life

Draw a nonagon using a ruler and a protractor.

Draw a nonagon using a ruler and a protractor.

School Life

I wonder if I can fit a nonagon inside this circle.

The architect designed the plaza in the shape of a nonagon.

The architect designed the plaza in the shape of a nonagon.

Business

Is this an irregular nonagon or a regular one?

Is this an irregular nonagon or a regular one?

School Life

The ancient seal was carved as a perfect nonagon.

The ancient seal was carved as a perfect nonagon.

History

He spent the afternoon calculating the area of a nonagon.

School Life

The crystal structure resembles a nonagon when viewed from above.

The crystal structure resembles a nonagon when viewed from above.

Trivia

Related Words

Última atualização: May 2026Reportar um erro