Answer:
140°
Explanation:
a regular polygon is equiangular, equal angles.
a nonagon is a 9 sided polygon
the sum of the interior angles of a polygon is
sum = 180° (n - 2 ) ← n is the number of sides
here n = 9 , then
sum = 180° (9 - 2) = 180° × 7 = 1260° , then
each angle = 1260° ÷ 9 = 140°