Top - half circle with a radius of (6 -2 -1) / 2 = 3/2 =1.5
Area = 3.14 (1.5)^2
Middle - a rectangle with dimensions of (6 + 1) x 4 = 7 x 4 = 28
Bottom - a rectangle with dimensions of 6 x 3 = 18
Total area =
[ 3.14 * 1.5^2 + 28 + 18 ] km^2 =
53.065 km^2
