The area of the shaded portion can be found below
radius = 8 meters
[tex]\begin{gathered} \text{area =}\frac{\emptyset}{360}\times\pi r^2 \\ \text{area}=\frac{360-135}{360}\times8^2\times\pi \\ \text{area}=\frac{225}{360}\times64\pi \\ \text{area}=\frac{14400\pi}{360} \\ \text{area}=40\pi\text{ square meters} \end{gathered}[/tex]
