public double getArea()
{
double first = point1.getDistance(point2);
double second = point1.getDistance(point3);
return(first * second);
}
public double getPerimeter()
{
double first = point1.getDistance(point2);
double second = point2.getDistance(point3);
double third = point3.getDistance(point1);
return(first + second + third);
}