static void Main(string[] args) { Shape rectangle = new Rectangle(12, 32); Shape square = new Square(12); Shape triangle = new Triangle(12, 32, 22); Console.WriteLine("The rectangle's area is: {0}; IsLegal: {1}", rectangle.Area, rectangle.IsLegal()); Console.WriteLine("The square's area is: {0}; IsLegal: {1}", square.Area, square.IsLegal()); Console.WriteLine("The triangle's area is: {0}; IsLegal: {1}", triangle.Area, triangle.IsLegal()); }