Answer:
Because, Angle ABC is incribed in arc AC .
We know that it's 2times than angle ABC.
THEREFORE, 60 × 2 = 120
B. 120° degrees
Explanation:
Inscribed angle ABC = 60°
Arc AC = 2 * < ABC (Relation between arc and inscribed angle)
Arc AC = 2 * 60°
= 120°
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