static void Main(string[] args) { var circle = new Circle(5); Console.WriteLine(circle.CalculateArea()); Console.WriteLine(circle.CapculatePerimeter()); var triangle = new Triangle(2, 2); Console.WriteLine(triangle.CalculateArea()); Console.WriteLine(triangle.CapculatePerimeter()); var rectangle = new Rectangle(3, 3); Console.WriteLine(rectangle.CalculateArea()); Console.WriteLine(rectangle.CapculatePerimeter()); }