The perimeter of a rectangle is 34 units. Its width is 6.5 units

And what else is there do you want the length? and the width?.

okay so a rectangle right? one side is 6.5, since one side should be perpendicular to another, that's 13 units off. So 34-13=?21, so 21/2 is 10.5.

So the length is 10.5