in c++, You have four classes--Polygon, Rectangle, Triangle, and Square. The latter three are subclasses of Polygon. Look through and understand the provided code. Implement the appropriate functions and classes where the comments indicate.

#include #include

using namespace std;

class Polygon{ protected: vector sides; public: virtual ~Polygon() {} double perimeter() { //Implement this function double perimeter = 0; for (int i=0; i < sides.size(); i++){ perimeter += sides[i]; } return perimeter; } virtual double area() = 0; };

class Rectangle : public Polygon { public: Rectangle() { sides.push_back(0.0); sides.push_back(0.0); } Rectangle(double a, double b) { sides.push_back(a); sides.push_back(b); } virtual double area() { // Implement this function double area = 1; for (int i=0; i < sides.size(); i++){ area *= sides[i]; } return area; } virtual double perimeter() { // Implement this function double perimeter = 0; for (int i=0; i < sides.size(); i++){ perimeter += sides[i]; } return perimeter; } };

class Triangle : public Polygon { double base; double height; public: Triangle() { sides.push_back(0.0); sides.push_back(0.0); sides.push_back(0.0); } Triangle(double a, double b, double c) { sides.push_back(a); sides.push_back(b); sides.push_back(c); } // Assume that the base and height will be set correctly externally void setBase(double _base) { base = _base; } void setHeight(double _height) { height = _height; } virtual double area() { // Implement this function double area = (0.5) * base * height; return area; } };

class Square : public Polygon { //Implement this class double side; public: Square() {sides.push_back(0.0);} Square(double s){sides.push_back(s);} void setSide(double_side) {side = _side;} //implement this class virtual double area() { //implement this function double area = side * side; return area; } virtual double perimeter() { //implement this function double perimeter = 4 * side; return perimeter; } };

// You may use main for testing int main(){ return 0; }