It has four equal sides and four right angles, each measuring 90 degrees. A regular nonagon is a nine-sided shape with equal sides and equal angles of 140 degrees each.
Simply so, what is the sum of the interior angles of a regular Nonagon?
What are the interior angles of a 9 sided polygon?
The General Rule
|Shape||Sides||Sum of Interior Angles|
|Any Polygon||n||(n-2) × 180°|
What is the interior and exterior angle of a regular Nonagon?
The sum of the exterior angles of any polygon is 360 degrees. Therefore to find the measure of one exterior angle of any regular (all angles are congruent) polygon, divide 360 by the number of angles. In the case of a regular nonagon, the measure of one exterior angle is 40 degrees: 360 / 9 = 40 degrees.