Yes, but that is not my problem. I want to define precise distance relative to other nodes. For instance, if I want node "x" to be distance "p" from node "y," and node "y" to be distance "q" from node "z," and node "x" to be distance "r" from node "z," then no matter how I would move one node, the others would adjust accordingly. So it's not a matter of establishing absolute position within the x- and y-coordinates, but relative distance based on position of other nodes.
I hope this is clearer this time!