Answer
The area of the triangle is approximately $\text{16 square yards}$.
Work Step by Step
Area of the triangle $=\frac{1}{2}ac\sin B$
Putting the values in the formula, we get
$\begin{align}
& \frac{1}{2}ac\sin B=\frac{1}{2}\left( 8 \right)\left( 5 \right)\left( \sin 125{}^\circ \right) \\
& \approx 16
\end{align}$
The area of the triangle is approximately $16$ square yards.
