Using the givens on the figure below, find the area of the shaded area.
Step 1: Divide the unshaded region into two rectangles.
The length of the smaller unshaded rectangle is , and its
width is .
The length of the larger unshaded rectangle is , and
its width is .
Step 2: Find the area of the two unshaded rectangles.
Step 3: Find the area of the whole rectangle (including the
Step 4: Find the area of the shaded region.
Subtract the area of the two unshaded rectangles from the area of
the whole rectangle.