We have a circle of radius 5 m inside a square of side 10 m. The shaded area is:
[tex]A_{\text{Shaded}}=A_{\text{Square}}-A_{\text{Circle}}[/tex]
Now, we calculate the area of the square and the circle:
[tex]\begin{gathered} A_{\text{Square}}=10^2=100m^2 \\ A_{\text{Circle}}=\pi\cdot5^2=25\pi m^2 \end{gathered}[/tex]
Finally, the shaded area is:
[tex]A_{\text{Shaded}}=100-25\pi\approx21.5m^2[/tex]
