Central Angle of Circle is an angle whose apex (vertex) is the centre O of a Circle and whose legs (sides) are radii intersecting the circle in two distinct points. And is denoted by ∠Central. Central Angle of Circle is usually measured using the Degree for Angle. Note that the value of Central Angle of Circle is always positive. Typically, the value of Central Angle of Circle lies in the range from 0 to 360.