Answer
$\frac{13\pi}{180}\text{radians}.$
Work Step by Step
To convert from degrees to radians, the answer in degrees must be multiplied by $\frac{\pi}{180^\circ}$.
Therefore:
$13^{\circ}=13\cdot\frac{\pi}{180^{\circ}}\text{radians}=\frac{13\pi}{180}\text{radians}.$
