private Length Sqrt(Length l)
 {
     return(Length.FromMeters(Math.Sqrt(l.Meters())));
 }
 public CartesianVector(Length x, Length y)
 {
     X = x;
     Y = y;
 }
        private Length Square(Length l)
        {
            var m = l.Meters();

            return(Length.FromMeters(m * m));
        }