Side of a square is $22$ m and a half-circle is drawn outside on one side. Area of the half-circle is approximately (use $\pi=3.1416$) —

The half-circle's diameter equals the square's side $22$ m, so its radius is $11$ m, and the area is $\frac{1}{2}\pi r^{2}=\frac{1}{2}\times 3.1416\times 11^{2}\approx 190.07$ sq m. Half of a full circle's area gives the semicircle.