#1**+2 **

You should know that the circumference on a circle is 2pi r

well

the angle in a revolution is also 2pi radians and you should know it is also 360 degrees so...

\(360\;\; degrees=2\pi\;\;radians\\ 180\;\; degrees=\pi\;\;radians\\ so\\ \frac{x}{180}*180\;\; degrees=\frac{x}{180} \pi\;\;radians\\ x \;\; degrees=x*\frac{\pi}{180} \;\;radians\\~\\ 330 \;\; degrees=330*\frac{\pi}{180} \;\;radians\\\)

Melody
May 29, 2017