8640 is the sum of the measures of the interior angles of a convex 50-gon.
(n-2) (180), (50-2) (180)
(48) (180) = 8640
What is interior angles?
Interior angles are the angle that are inside the shape. Polygon, consist of closed shape that has sides and vertices.
A perfect triangle or regular have equal angles that is 60 degree. For example, square has its four sides and angle are equal that is all make 90-degree angles to form a perfect square.
Thus, option B is correct.
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