Question 10
In the diagram, square $ABCD$ is inscribed in a circle. Its diagonals meet at $O$. Points $E,F,G,H$ are the midpoints of $AO,BO,CO,DO$, respectively. What fraction of the circle’s area is shaded?
Interpretation: The shaded region is inside ABCD and outside EFGH. The four inner vertices are the named midpoints.
Interpretation: The shaded region is inside ABCD and outside EFGH. The four inner vertices are the named midpoints.