Question 23Semicircles $POQ$ and $ROS$ pass through the center of circle $O.$ What is the ratio of the combined areas of the two semicircles to the area of circle $O?$ $ \dfrac{\sqrt 2}{4} $$ \dfrac{1}{2} $$ \dfrac{2}{\pi} $$ \dfrac{2}{3} $$ \dfrac{\sqrt 2}{2} $
