Angular Displacement, Velocity & Acceleration

a) Angular Displacement:-  
Change in angular position of an object with respect to time is called 'Angular Displacement'.

b) Angular Velocity:- 

Rate of change of angular displacement with respect to time is called ' Angular Velocity'. Angular velocity is denoted by     (Omega).

c) Angular Acceleration:- 

Rate of change of angular velocity with respect to time is Called 'Angular Acceleration'.