alleryC is on major arc AB; tangent at A makes 50° with AB, ∠ABC=60°. ∠BAC?
A50°
B80°
C70°
D60°
Answer & Solution
Correct answer: C. 70°
The tangent-chord angle gives ∠ACB=50°, so ∠BAC=180°−50°−60°=70°.
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