Find the Sum of the Angles of a Polygon with 9

Multiple Choice

Find the sum of the angles of a polygon with 9 sides.

A) $1,262 ^ { \circ }$
B) $1,260 ^ { \circ }$
C) $1,270 ^ { \circ }$
D) $1,250 ^ { \circ }$
E) none of these