Specifying an exact value for a line segment?

QUESTION:  Is there a way to specify an exact value for individual line segments that are part of a multi-line object?

BACKGROUND:  We have a pre-existing floor plan that is not scaled properly.  We now have set the real-world scale for our drawing and need to modify the current floor plan.  The easiest way would be for us to select each individual segment of the exterior floor plan outline and then specify the new length for each segment.  Is there any way to select individual line segments in a polygon or shape and then set the length for each segment using a dialog box or some other form of exact number entry?

Thank you for any assistance.