A Chute at the Top of a Grain Elevator of a Combine

Multiple Choice

A chute at the top of a grain elevator of a combine funnels the grain into a bin (see figure) . Find the angle between two adjacent sides. Round your answer to one decimal place.

A) $89.3 ^ { \circ }$
B) $91.6 ^ { \circ }$
C) $90.7 ^ { \circ }$
D) $86.4 ^ { \circ }$
E) $181.6 ^ { \circ }$