Question

I need help with #28

Answer 1

9514 1404 393

Answer:

13

Explanation:

If we assume that points P, Q, R, S are in that order on a arc centered at O, then we have ...

∠POQ +∠QOS = ∠POR +∠ROS

∠ROS = ∠POQ +∠QOS -∠POR

∠ROS = 28 +46 -61 = 13