The sum of the exterior angles of any polygon is 360 degrees. this is true whether the figure is regular or irregular, and irrespective of how many sides/vertices it has. For a regular nonagon, the 9 equal external angles sum to 360 degrees and so each measures 360/9 = 40 degrees.
An equilateral triangle is the only polygon in which the exterior angle is larger than the interior angle. They are equal in a square and smaller in all regular polygons with more sides,
For a regular (all sides equal length) nonagon, each internal angle is 140 degrees <http://en.wikipedia.org/wiki/Nonagon>
It will have 9 equal sides.
it means you have a 9-gon that has all equal sides and all angle measures are congruent
The sum of the exterior angles of any regular polygon is equal to 360 degrees.
Angle and sides. Interior angles being equal means that exterior angles are equal.
The measure of an exterior angle of an equiangular pentagon is 72 degrees. An equiangular pentagon is a regular pentagon that has five equal sides and five equal angles. An interior angle of a pentagon is equal to 108 degrees.
A nine sided nonagon is only a regular shape if it has 9 equal sides
Then it will have 9 equal sides.
It is a nonagon. It need not be a regular nonagon.