That's one of those things where you just have to see how it works, or to be able to move the camera so you can get the framing you want with the lens you have.

If you are on a PC, look up a shareware program that performs many useful photographic calculations on the net called F/calc. It will give you the vertical, horizontal, and diagonal angle of view for any lens in any of the common formats up to 11x14", and that should tell you what you need.