Question 97789
Diameter of the semi circle =s
radius of the semi circle =s/2
area of the semi circle = {{{(1/2)pi(s/2)^2}}}
                        = {{{(1/8)pi(s^2)}}}

Area of the square part of the window = {{{s^2}}}

Total Area of the window (A) = {{{(1/8)pi*s^2}}} + {{{s^2}}}
                             = {{{s^2((pi)/8 + 1)}}}