To eliminate the possibility of using an answer more than once on a matching question, one should preferabbly cross out the answer which has already been used. But that isn’t a hard and fast rule. If you feel comfortable with using any other method that makes you understand better, you can always go for
The circular pie because it would equal to 153.94 and the rectangle only has most likely its longer side, so even if it was 11x12 it would only be 132. So therefore, the circular pie is correct.