In a circle with centre O, chords PR and QS meet at the point T, when produced, and PQ is a diameter. If ∠ROS = 42o, then the measure of ∠PTQ is
Answer & explanation
Correct answer: option 4
We know that,
∠PTQ = \(\frac{1}{2}\) × (180 - ∠ROS )
∠PTQ = \(\frac{1}{2}\) × (180 - 42)
= ∠PTQ = 69°