public static void Main()
{
Triangle triangle = new Triangle(4, 5);
Console.WriteLine(triangle.CalculateSurface());
var rectangle = new Rectangle(3, 5);
Console.WriteLine(rectangle.CalculateSurface());
var circle = new Circle(4);
Console.WriteLine("{0:F2}", circle.CalculateSurface());
}
static void Main(string[] args)
{
Triangle tr = new Triangle(1, 3);
Rectangle rect = new Rectangle(2, 2);
Circle circle = new Circle(3);
Console.WriteLine(tr.CalculateSurface());
Console.WriteLine(rect.CalculateSurface());
Console.WriteLine(circle.CalculateSurface());
}
static void Main(string[] args)
{
Triangle tr = new Triangle(1, 3);
Rectangle rect = new Rectangle(2, 2);
Circle circle = new Circle(3);
Console.WriteLine(tr.CalculateSurface());
Console.WriteLine(rect.CalculateSurface());
Console.WriteLine(circle.CalculateSurface());
}
