Convert from Degrees to Radians $- 45 ^ { \circ }$

Multiple Choice

Convert from degrees to radians. Use the value of π found on a calculator and round answers to four decimal places, as needed.
- $- 45 ^ { \circ }$

A) $- \frac { \pi } { 6 }$
B) $- \frac { \pi } { 4 }$
C) $- \frac { \pi } { 3 }$
D) $- \frac { \pi } { 5 }$