i considered
DEFGD
oops forgot that........
shaded are is DEFGD.........
@palani post ur soln........its rite.....
area of the triangle 8
area of the sector ADE \frac{\pi r^2}{4}
---> \pi
2*area of DBGD=2* \frac{\pi r^2}{8}
-------->\pi
reqd area=8-2\pi