Using C++Create these classes:Polygon Class (abstract superclass)Variablesdouble widthdouble heightdouble depth Member functionsset_values() Sets values for height and width based upon user input get_values()Display the current width and height valuesPolymorphic member functions:area()perimeter()draw()Make Polygon Class Abstract Right_Triangle Class (subclass of Polygon)Polymorphic member functions:area()(height *width) /2 perimeter()height + width + (sqrt(height*height + width*width))draw() Rectangle Class (subclass of Polygon) Variablesint size = 3double temp_result_for_chainingdouble* history_width_ptrdouble* history_height_ptrint array_indexordouble* temp_history_width_ptrdouble* temp_history_height_ptrFunctionsConstructor creates space in free memory for two arrays that can store previous values of width and height:history_width_ptr = new double[size] // allocate new memory to previous width valueshistory_height_ptr = new double[size] // allocate new memory to previous height valuesDestructordelete[] history_width_ptrdelete[] history_height_ptrstore_in_arrays() Stores width and height values into the two arrays in free storage pointed at by history_width_ptr and history_height_ptr get_historical_values()Display the historical width and height values from the two arrays. Polymorphic member functionsarea()perimeter()Add all the sides.draw()Example output ----------------- | | -----------------You don’t have to draw to scale, but show show a symbolic example of a rectangle Learning from the "this Pointer and Methods/Functions Chaining" example code in the files above, add method/function chaining to class Rectangle.Add these methods/functions with the ability to chain:multiply_width_by_height()multiply_by_depth()display_volume()Using this- and the return *this within your chaining functions. Within main()Two objects are created: a rectangle and a right-triangle.User input is aquired 3 times for modifying the two objects in terms of height, width, and depth (depth is used only by the rectangle).Demonstrate dynamic polymorphism by calling the polymorphic member functions: area(), circumference(), and draw()Also, dynamic memory is implemented through the use of the history arrays in free storage (the heap) used by Rectangle objects.Fill the two arrays with historical values of width and height and display their values.Demonstrate methods/functions chaining by calling up these functions through a Rectangle object in main. multiply_width_by_height()multiply_by_depth()display_volume()You may also find other ways to show off your code.Some extra credit could come your way! EXAMPLE OUTPUT: You will enter the width and height to create both a triangle object and a rectangle object...Please enter the width: 5Please enter the height: 4For Right-TriangleArea = 10Perimeter = 15.4 / | / | ------For RectangleArea = 20Perimeter = 18-------------| |-------------Please enter the depth: 10Volume of Rectangle using method or function chaining = 200 THE ABOVE LOOPS FOR 3 TIMES (TO FILL THE ARRAYS) AND THEN OUTPUTS THE FINAL ARRAYSHeight Array = 5, ...Width Array = 4, ...

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Using C++Create these classes:Polygon Class (abstract superclass)Variablesdouble widthdouble heightdouble depth     Member functionsset_values()  Sets values for height and width based upon user input  get_values()Display the current width and height valuesPolymorphic member functions:area()perimeter()draw()Make Polygon Class Abstract  Right_Triangle Class (subclass of Polygon)Polymorphic member functions:area()(height *width) /2 perimeter()height + width + (sqrt(height*height + width*width))draw()   Rectangle Class (subclass of Polygon)   Variablesint size = 3double temp_result_for_chainingdouble* history_width_ptrdouble* history_height_ptrint array_indexordouble* temp_history_width_ptrdouble* temp_history_height_ptrFunctionsConstructor creates space in free memory for two arrays that can store previous values of width and height:history_width_ptr = new double[size] // allocate new memory to previous width valueshistory_height_ptr = new double[size] // allocate new memory to previous height valuesDestructordelete[] history_width_ptrdelete[] history_height_ptrstore_in_arrays()   Stores width and height values into the two arrays in free storage pointed at by history_width_ptr and history_height_ptr get_historical_values()Display the historical width and height values from the two arrays. Polymorphic member functionsarea()perimeter()Add all the sides.draw()Example output                                -----------------                                |                    |                                -----------------You don’t have to draw to scale, but show show a symbolic example of a rectangle Learning from the &#34;this Pointer and Methods/Functions Chaining&#34; example code in the files above, add method/function chaining to class Rectangle.Add these methods/functions with the ability to chain:multiply_width_by_height()multiply_by_depth()display_volume()Using this-> and the return *this within your chaining functions. Within main()Two objects are created: a rectangle and a right-triangle.User input is aquired 3 times for modifying the two objects in terms of height, width, and depth (depth is used only by the rectangle).Demonstrate dynamic polymorphism by calling the polymorphic member functions: area(), circumference(), and draw()Also, dynamic memory is implemented through the use of the history arrays in free storage (the heap) used by Rectangle objects.Fill the two arrays with historical values of width and height and display their values.Demonstrate methods/functions chaining by calling up these functions through a Rectangle object in main. multiply_width_by_height()multiply_by_depth()display_volume()You may also find other ways to show off your code.Some extra credit could come your way!    EXAMPLE OUTPUT: You will enter the width and height to create both a  triangle object and a rectangle object...Please enter the width:  5Please enter the height: 4For Right-TriangleArea = 10Perimeter = 15.4     / |   /   | ------For RectangleArea = 20Perimeter = 18-------------|              |-------------Please enter the depth: 10Volume of Rectangle using method or function chaining = 200   THE ABOVE LOOPS FOR 3 TIMES (TO FILL THE ARRAYS) AND THEN OUTPUTS THE FINAL ARRAYSHeight Array = 5, ...Width Array = 4, ...

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