static void Main(string[] args)
{
Triangle rect = new Triangle(new Point(), new Point(1, 0), new Point(0, 1));
rect.Display();
Console.WriteLine(rect.Square());
Circle circ = new Circle(3);
circ.Display();
Console.WriteLine(circ.Square());
Circle circ2 = new Circle(new Point(), new Point(4, 0));
circ2.Display();
Console.WriteLine(circ2.Square());
Console.ReadLine();
}
