Consider a graphics system that has classes for various figures– rectangles, squares, triangles, circles and so on. For example, arectangle might have data members for height, width and centerpoint, while a square and circle might have only a center point andan edge length or radius, respectively. In a well-designed system,these would be derived from a common class, Figure. You are toimplement such a system. The class Figure is the base class. Youshould add only Rectangle and Triangle classes derived from Figure.Each class has stubs for member functions erase and draw. Each ofthese member functions outputs a message telling what function
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