static void Main(string[] args)
{
Point centreRect = new Point(1, 1);
Point centreSquare = new Point(0, 0);
Rectangle rect = new Rectangle(3, 5, centreRect);
Square square = new Square(2, centreSquare);
Ellipse ellipse = new Ellipse(2, 1, centreSquare);
Console.WriteLine(rect.ToString());
Console.WriteLine(rect.GetArea() + " " + rect.GetPerimeter());
Console.WriteLine(square.ToString());
Console.WriteLine(square.GetArea() + " " + square.GetPerimeter());
Console.WriteLine(ellipse.ToString());
Console.WriteLine(ellipse.GetArea() + " " + ellipse.GetPerimeter());
}