Answer:
70°
Explanation:
64 * 2 = 128
Inscribed angle is half the arc, so arc BC is 128-90 = 38
A is half of arc BCD, which is 102 + 38 = 140
so m<A = 70°
70 degrees
Measure of arc ABC is 128 degrees, so measure of arc BC is 128-90 = 38 degrees.
Meausure of arc BCD is 102 + 38 = 140 degrees, so measure of angle A is 140/2 = 70 degrees
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