1) Subtract the upper right 10 ft square from the overall 18 ft square. .. (18 ft)^2 -(10 ft)^2 = 224 ft^2
3) The area of this is the sum of the areas of a rectangle 11 in by 7 in, and a triangle with base 7 in and height 5 in. .. (11 in)*(7 in) +(7 in)*(5 in) .. = (7 in)*(11 in +2.5 in) = 94.5 in^2
4) The central rectangle is 10 cm by 14 cm; the remaining triangle has a height of 7 cm and a base of 24 cm. .. (10 cm)*(14 cm) +(24 cm)*(7 cm)/2 .. = 140 cm^2 +84 cm^2 .. = 224 cm^2
