Free Version
Moderate

# A Sector Created by a Square

SATMAT-TK1SNU

Circle $O$ is circumscribed about square $ABCD$. If $BC=8$, then what is the area of the shaded sector bounded by points $A,B$, and $O$, as shown in the figure above?

(No Calculator)

A

$4\pi$

B

$8\pi$

C

$16\pi$

D

$24\pi$