i didn't completely read all the posts in this thread, but:

you can use the law of sines and the law of cosines to find the missing sides if you get a side and an angle....

law of sines:
A/sin(a) = B/sin(b) = C/sin(c)

where segment A is oposite angle a, so on, so forth.

i can't quite remember the law of cosines....