1 revolution = 360 degree = 2π radians

denoted by θ

it is defined as the angle and the direction through which a body turns

measured using radian per second [rad/s] or revolution per minute [rpm]

denoted by ω

it is the rate of change of angular displacement with respect to time

measured using radian per square second [rad/s^2]

denoted by a

it is the rate of change of angular velocity with respect to time

ωf = ωi + α t
ωf^2 = ωi^2 + 2 α (θf - θi)
θf = θi + ωi t + 1/2α t^2

ωi = initial angular velocity [rad/s]
ωf = final angular velocity [rad/s]
α = angular acceleration [rad/s2]
θi = initial angular displacement [rad]
θf = final angular displacement [rad]
t = time [s]

r = radius of rotation [m]
s = linear displacement [m]
θ = angular displacement [rad]
v = tangential velocity [m/s]
ω = angular velocity [rad/s]
at = tangential acceleration [m/s2]
α = angular acceleration [rad/s2]
an = normal or centripetal acceleration [m/s2]

s = r θ
v = r ω
at = r α
an = r ω^2 = 𝑣^2/r