Design a class named Triangle that extends

Question

GeometricObject. The class contains:
• Three double data fields named side1, side2, and side3 with default values 1.0 to denote three sides of the triangle.
• A no-arg constructor that creates a default triangle.
• A constructor that creates a rectangle with the specified side1, side2, and side3.
• The accessor functions for all three data fields.
• A function named getArea() that returns the area of this triangle.
• A function named getPerimeter() that returns the perimeter of this triangle.

Draw the UML diagram that involving the classes Triangle and GeometricObject. Implement the class. Write a test program that creates a Triangle object with sides 1, 1.5, 1, setting color yellow and filled true, and displaying the area, perimeter, color, and whether filled or not.

Answer 1

```
#include
#include "GeometricObject.h"
#include
using namespace std;

class Triangle : public GeometricObject
{
private:
double side1, side2, side3;

/** Constructor */
public:

Triangle(double side1, double side2, double side3)
{
this->side1 = side1;
this->side2 = side2;
this->side3 = side3;
}

/** Implement the abstract method findArea in GeometricObject */
double getArea()
{
double s = (side1 + side2 + side3) / 2;
return sqrt(s * (s - side1) * (s - side2) * (s - side3));
}

/** Implement the abstract method findCircumference in GeometricObject */
double getPerimeter()
{
return side1 + side2 + side3;
}

double getSide1()
{
return side1;
}

double getSide2()
{
return side2;
}

double getSide3()
{
return side3;
}
};

int main()
{
Triangle shape(1, 1.5, 1);
shape.setColor("yellow");
shape.setFilled(true);

cout << shape.getArea() << endl;
cout << shape.getPerimeter() << endl;
cout << shape.getColor() << endl;
cout << shape.isFilled() << endl;

return 0;
}
``````

```