A nonagon aka enneagon
The sum of the interior angles of any polygon of n sides is equal to 180(n - 2) degrees.
The polygon will have 12 equal sides and each interior angle measures 150 degrees.
The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees.
The total of the interior angles equal 5040, and each angle measures 168 degrees The total of the exterior angles equal 360, and each angle measures 12 degrees
If all of its interior angles are equal then it is a regular polygon
A 4 sided quadrilateral has interior angles that add up to 360 degrees and its exterior angles add up to 360 degrees
Only when it is a regular polygon that all interior angles are of equal measure
The sum of a regular polygon's interior angles is always equal to (n-2) * 180, where n is the number of sides in the polygon. Given that one exterior angle measures 40 degrees, we can find the interior angle by subtracting 40 from 180 degrees (since the exterior and interior angles are supplementary) to get 140 degrees. So, the sum of the interior angles of the regular polygon is 140 * n.
A pentagon (5 sided polygon) has the sum of its interior angles equal 540°.The formula for a general N-sided polygon is:[sum of interior angles] = N*180° - 360°
A regular polygon.
Only if it is a regular polygon.
Only if the polygon is "regular".