In a circle with center O, PQR is a tangent at the point Q on it. AB is a chord in the circle parallel to the tangent such that ∠BQR = 50°. What is the measure of ∠AQB?
Answer & explanation
Correct answer: option 3
AB ll PR
∠BAQ = 50° (Alternate segment)
∠ABQ = 50° (Alternate angle)
∠AQB = 180° - 100° = 80°