#1**0 **

Angle(AOB) = 360^{o} - 215^{o} = 145^{o}.

The radius of the circle appears to be slightly larger than 3, so the area of the whole circle is

slightly larger than pi·3^{2} or a little more than 9 pi.

Since the central angle is 145^{o}, the area that we want is slightly more than

145/360·9pi = 11.4 square units.

The closest answer seems to be 11 square units.

geno3141 Jul 17, 2020