static void Main(string[] args)
{
//ShapeBase shape = new ShapeBase();
Triangle triangle = new Triangle(3, 4, 5);
Console.WriteLine(triangle.Name);
Console.WriteLine(triangle.GetPerimeter());
Console.WriteLine(triangle.GetSquare());
IsoscelesTriangle triangle2 = new IsoscelesTriangle(5, 4);
Console.WriteLine(triangle2.Name);
Console.WriteLine(triangle2.GetPerimeter());
Console.WriteLine(triangle2.GetSquare());
EquilateralTriangle triangle3 = new EquilateralTriangle(3);
Console.WriteLine(triangle3.Name);
Console.WriteLine(triangle3.GetPerimeter());
Console.WriteLine(triangle3.GetSquare());
RectangularTriangle triangle4 = new RectangularTriangle(3, 4);
Console.WriteLine(triangle4.Name);
Console.WriteLine(triangle4.GetPerimeter());
Console.WriteLine(triangle4.GetSquare());
Console.ReadKey();
}