Answer
98.4
Work Step by Step
We assume the length of the first diagonal to be about:
$2(8.2)=16.4$
The apothem is 12, and this is the other diagonal. Thus, we approximate area:
$A = \frac{d_1d_2}{2} = \frac{16.4 \times 12}{2} \approx 98.4$