Question 8In the diagram, square $ABCD$ is inscribed in a circle. Its diagonals intersect at $O$. Points $E,F,G,H$ are the midpoints of $AO,BO,CO,DO$, respectively. What fraction of the area of the circle is the shaded area? $\frac{3}{4\pi}$$\frac{1}{4\pi}$$\frac{1}{2\pi}$$\frac{3}{2\pi}$None of the above
