[poll id=”60″]
ANSWER: D. 1260°
The sum of interior angles for any regular shaped polygon can be determined with the following equation:
(n-2) * 180°
Where n is # of sides. In this case, a nonagon is a 9 sided polygon. Plugging in 9 in the equation gives 1260° for all 9 sides combined. If asked for EACH angle, then you would just divide 1260° by 9.