Problem 1. Think of the outer rectangle by joining the two 5 in. sides with a segment. Now you have an outer blue rectangle with a white rectangle missing. For the outer rectangle: The top and bottom sides measure 28 in. The left and right sides measure 5 in. + 12 in. + 5 in. = 22 in. Area of the outer rectangle = LW = 28 in. * 22 in. = 616 in.^2 Now look at the white square. You need to subtract this area from the outer rectangle. area of white rectangle = LW = 12 in. * 15 in. = 180 in.^2
Problem 2. Do the same thing as for problem 1. Join the two 4 in. segments with a line. </span> <span>Think of the outer rectangle by joining the two 4 in. sides with a segment. Now you have an outer blue rectangle with a white rectangle missing. For the outer rectangle: The top and bottom sides measure 24 in. The left and right sides measure 4 in. + 12 in. + 4 in. = 20 in. Area of the outer rectangle = LW = 24 in. * 20 in. = 480 in.^2 Now look at the white square. You need to subtract this area from the outer rectangle. area of white rectangle = LW = 12 in. * 13 in. = 156 in.^2