. #include<iostream>
#include<cmath>

using namespace std;

class geofig {
protected:
    double side1, side2;

public:
    void getdata() {
        cout << "Enter the sides of the figure: ";
        cin >> side1 >> side2;
    }

    virtual void display() {
        cout << "Sides: " << side1 << " and " << side2 << endl;
    }
};

class rect : public geofig {
public:
    void display() override {
        cout << "Rectangle - ";
        geofig::display();
        cout << "Area: " << side1 * side2 << endl;
    }
};

class tri : public geofig {
public:
    void display() override {
        cout << "Triangle - ";
        geofig::display();
        double s = (side1 + side2) / 2.0;
        double area = sqrt(s * (s - side1) * (s - side2));
        cout << "Area: " << area << endl;
    }
};

int main() {
    int choice;
    geofig* figure;

    cout << "Choose a figure: \n";
    cout << "1. Rectangle\n";
    cout << "2. Triangle\n";
    cout << "Enter your choice (1 or 2): ";
    cin >> choice;

    switch (choice) {
        case 1:
            figure = new rect();
            break;
        case 2:
            figure = new tri();
            break;
        default:
            cout << "Invalid choice!\n";
            return 1;
    }

    figure->getdata();
    figure->display();

    delete figure;

    return 0;
}