Question 48190
The question is a bit confusing but I think I know what you are asking if you need the rea of a square window of with length s that is s^2.  For the semi circle the formula for the semi circle is 0.5*pi*r^2 where r is the radius and diamter s in this case is r = 0.5s so we have 0.5*pi*(0.5*s)^2

so f(x) = s^2 + 0.5*pi*(0.5*s)^2 this is assuming that the semicircle is outside and seperate from the square.  Let me know if you need more help on this