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3. Create a class Polygon, Polygon has a private member int NumSides. Derive from polygon two classes Rectangle (NumSides=4) and Triangle (NumSides = 3). Rectangle has a private member data int Area, Triangle has a private data int Perimeter. From a menu, allow the user to create a mixed linked list of polygon pointers to polygons, Rectangles and Triangles. When the user has finished adding these to the list, display the list. If the user wants to add a rectangle or a triangle you must allow them to enter the length of the sides so the area and perimeter can be computed.

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3. Create a class Polygon, Polygon has a private member int NumSides. Derive from polygon two classe...
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