Answer: The sum of the measures of the exterior angles of a regular 9-gon, one at each vertex, is equal to the sum of the measures of the exterior angles of a regular 6-gon, one at each vertex.
Explanation:
We know that If we count one exterior angle at each vertex of all regular polygon, then the sum of the measures of the exterior angles of a polygon is always
.
Thus, the sum of exterior angle is same for regular 9-gon and regular 6-gon.
Therefore, the sum of the measures of the exterior angles of a regular 9-gon, one at each vertex, is equal to the sum of the measures of the exterior angles of a regular 6-gon, one at each vertex.