what's the measure of the interior angles of the convex of 11-gon

Question

find the sum of the measures of the interior angles of the each convex 11-gon.

Answer 1

For the Euclidean N-gon, the sum is 180°(N-2) in degrees, or π(N-2) in radians.

 

So in your case, you get 180°·9 = 1620°.