Conversion of Degree to Radian and Radian to Degree.

The angle of rotation is often measured in the unit called the radian. (Radians are dimensionless units and are defined as the ratio of two distances, radius and arc length.) 

One complete revolution around the circumference of a circular object covers 2π radians or 360^o in degree. Radian and degree are interconvertible and we can convert them using this relationship 

1 revolution = 2π radians = 360^o 

1 radian = 360^o/ 2π = 57.3^o (approx.)