//constructors public Circle(Centroid Center, double Radius) : base(Center) { this.Radius = Radius; }
public Shapes(Centroid Center) { this.Center = Center; }
public Square(Centroid Center, double Width, double Height) : base(Center) { this.Width = Width; this.Height = Height; }
public Centroid(Centroid a) { x = a.x; y = a.y; }