How do you convert 160 degrees into radians?

We use a goofy system where our circle constant $\pi$ radians is half a circle, ${180}^{\circ} .$ So,
${160}^{\circ} \setminus \times \frac{\pi \textrm{r a \mathrm{di} a n s}}{{180}^{\circ}} = \frac{8 \pi}{9}$ radians