A nonagon has nine sides, it's a nine sided polygon. Nonan is greek for nine. A regular nonogon will have an internal angle of 140 degrees.

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How **many** diagonals a **nonagon** does have is 27. How one figures this out is they use the formula (n/2)(n-3). ...

A **nonagon** is a nine-**sided** polygon in geometry. The Latin prefix "nonus" means "ninth." Like **many** polygons, **nonagons** can be regular or irregular ...

A **nonagon** is a closed shape that has nine **sides**. If it is a regular **nonagon**, all nine **sides** are the same length, and all the angles are equal. The sum of the interior ...