Statement (A) : Angular displacement per unit time is called average angular velocity

Statement (B) : If the angular position of a particle is changed from${\theta }_1$ to${\theta }_2$ from time $t_1$to $t_2$ then

${\omega }_{avg}=\frac{∆\theta }{∆t}=\frac{{\theta }_2-{\theta }_1}{t_2-t_1}$