So, make a plane that is 2 units long by 2 units wide. What you are going to do is select two of the vertecies that form an edge on the plane. Then, move them such that they are coinciding with the other two vertecies. Now, if you are in the Model, click Move. There should be 3 white boxes directly under Snap to Grid and Move Options. Now, enter 9.899494936611665 into the box for the Z axis or the X axis, depending on which vertecies you moved in the first place.