Shown in the Figure Is a Plan for the Top $a = 22.3$

Multiple Choice

Shown in the figure is a plan for the top of a wing of a jet fighter, where $a = 22.3$ feet and $b = 18.9$ feet. Approximate angle $\varphi$ .

A) $32.4 ^ { \circ }$
B) $154.2 ^ { \circ }$
C) $145.4 ^ { \circ }$
D) $147.6 ^ { \circ }$
E) $152.0 ^ { \circ }$