3d radius

Just a thought...
To calculate the 3d radius of a point (like polar radius, but in 3D), just ASSIGN\V1=SQRT(DOT(PT1.XYZ,PT1.XYZ))
It's just a little more simple than SQRT(PT1.X^2+PT2.Y^2+PT1.Z^2), it's not very usefull, but I like it !!!!!