Triangle ABC is inscribed within a circle and has diameter line AB , with the inscribed angle at C . If the an

Question

Triangle  ABC  is inscribed within a circle and has diameter line  AB , with the inscribed angle at  C . If the angle measure of  A  is 15°, what is the arc measure of  AC ?(1 point)

GPT-5 mini · Answer

150°

Reason: AB is a diameter so C is 90°. With A = 15°, B = 180° − 90° − 15° = 75°. An inscribed angle equals half its intercepted arc, so arc AC = 2·∠B = 150°.

Triangle ABC is inscribed within a circle and has diameter line AB , with the inscribed angle at C . If the angle measure of A is 15°, what is the arc measure of AC ?(1 point)

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