regions that are basic figures. To find the area of a composite figure, separate the figure into basic figures of which we can find the area. The sum of the areas of the basic figures is the area of the figure. Find the area of the shaded region. a. Geo-SG11-04-01-860188 50 ft 30 ft The figure is a rectangle minus one half of a circle. determine the area of a composite figure and consequently there will be no single formula that applies to all composite figures. Be sure to include at least one demonstration that involves subtracting an excess area when determining the area. Using