Final answer:
The measure of an inscribed angle in a circle is equal to the measure of the intercepted arc.
Step-by-step explanation:
In a circle, an inscribed angle is an angle formed by two chords that have the same endpoint on the circle. The measure of an inscribed angle is equal to the measure of the intercepted arc.
For example, if an inscribed angle intercepts an arc of 60 degrees, then the measure of the angle is also 60 degrees.
Therefore, the correct answer is A. equal to.