2010 · Q58
In the figure given above (circle with diameter PQ, centre O; points R, S on circle; T outside at intersection of extended PR and extended QS), PQ is a diameter of the circle whose centre is at O. If ∠ROS = 44°, then what is the value of ∠RTS ?
Elementary MathematicsGeometry
- A46°
- B64°
- C69°
- DNone of the above
Explanation
∠RQS=½∠ROS=22°; ∠PRQ=90° (semicircle); ∠RTS=90°-22°=68°, not listed.