The measure of angle ∠ABC is 30°
Step-by-step explanation:
The angle is formed outside of a circle by intersection of two tangents.You have intercept arcs, major arc 210° and minor arc 150°.
The formula is ;
∠ABC=1/2 (major arc-minor arc)
∠ABC=1/2(210°-150°)
∠ABC=1/2(60°)
∠ABC=30°
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Angle formed by two tangents : https://brainly.com/question/13080775
Keyword : angle, tangent
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