Solution assignment 01 Unit circle and simple formulas

The following angles are given in degrees. Calculate them in radians.
30, 45, 90, 60, 180, 210, 225, 540

$30\rightarrow\displaystyle\frac{\pi}{6}$

$45\rightarrow\displaystyle\frac{\pi}{4}$

$90\rightarrow\displaystyle\frac{\pi}{2}$

$60\rightarrow\displaystyle\frac{\pi}{3}$

$180\rightarrow\pi$

$210\rightarrow\pi+\displaystyle\frac{\pi}{6}=\displaystyle\frac{7\pi}{6}$

$225\rightarrow\pi+\displaystyle\frac{\pi}{4}=\displaystyle\frac{5\pi}{4}$

$540\rightarrow3\pi$