Let C be a circle with center O and PQ is the diameter of C. Let AB be a chord on C. If ∠QOB = 40°, ∠AOP = 80°, then find ∠AOB.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 60°.
∠QOB + ∠AOB + ∠POA = 180°
∠AOB = 180° - 40°-80°
∠AOB = 60°