What is the theorem states that if two inscribed angles of a circle intercept the same arc, then the angles are congruent?

In the same circle, or in congruent circles, two chords are congruent if and only if they are equidistant from the center. States that the measure of an inscribed angle is one half the measure of its intercepted arc. States that if two inscribed angles of a circle intercept the same arc, then the angles are congruent.

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