Theorem 12-5 states that in a circle, the measure of a central angle is equal to twice the measure of its intercepted arc.
Theorem 12-5 states that in a circle, the measure of a central angle is equal to twice the measure of its intercepted arc. In other words, the central angle formed by two radii of a circle is equal to the measure of the arc intercepted by those radii multiplied by 2.
