The Inscribed Angle Theorem states that the measure of an inscribed angle is half the measure of the arc it intercepts.
For example, in the circle below, Another way to state the Inscribed Angle Theorem is that the measure of an inscribed angle is half the measure of the central angle that intercepts the same arc.
For example, in the circle below, Since every arc has the same measure as the central angle that intercepts it, the two versions of the theorem are equivalent.
