Answer:
arc AM = 114°
Step-by-step explanation:
the measure of a tangent- chord angle is half the measure of its intercepted arc, that is
∠ MAC = [tex]\frac{1}{2}[/tex] (AM )
57° = [tex]\frac{1}{2}[/tex] AM ( multiply both sides by 2 to clear the fraction )
114° = AM
