public static void main(String[] args) { // TODO Auto-generated method stub Point p1 = new Point(0, 0); Point p2 = new Point(-1, -2); Point p3 = new Point(20, 31); Triangle tri = new Triangle(p1, p2, p3); System.out.println(tri.toString()); Shape[] a = {new Circle(5), new Triangle(p1, p2, p3)}; }