In order to find an angle, you can use a protractor. You can turn angles that are in degrees and turn degrees into radian by knowing the following formulas.
[tex]1\ degree = \frac{\pi}{180}[/tex]
[tex]1\ radian = \frac{180}{\pi}[/tex]
So if we have a measure of 20 degrees we can convert it by multiplying the degrees by the radian formula like the following:
[tex]20\textdegree \times \frac{\pi}{180} = \frac{1}{9}\pi \ radian[/tex]
If we had 10 radian, we would use the following formula.
[tex]10 \times\frac{180}{\pi} = 572.95\textdegree[/tex]
