Convert the Degree Measure to Radians $\pi .$ - $- 45 ^ { \circ }$

Multiple Choice

Convert the degree measure to radians. Leave answer as a multiple of $\pi .$
- $- 45 ^ { \circ }$

A) $- \frac { \pi } { 4 }$

B) $- \frac { \pi } { 6 }$

C) $- \frac { \pi } { 3 }$

D) $- \frac { \pi } { 5 }$