public static double GetFigureSize(Figure _fgr)
        {
            double size = 0;
            double allX = 0;
            double allY = 0;
            double allZ = 0;
            foreach (Point pnt in _fgr.GetArray())
            {
                allX += pnt.GetX();
                allY += pnt.GetY();
                allZ += pnt.GetZ();
            }

            size = Math.Sqrt(Math.Pow(allX, 2) + Math.Pow(allY, 2) + Math.Pow(allZ, 2));
            return size;
        }