Radian

A radian is a way we can measure angles - just like degrees!

The radian has a few useful properties though.

Radians in a full circle

There are 2\pi radians in a full turn of a circle.

Converting from/to degrees

• 2\pi rad=360\degree
• so: 1\pi rad=180\degree

To convert degrees to radians:

• Multiply by \frac{\pi}{180}

To convert radians to degrees:

• Multiply by \frac{180}{\pi}