To prove this congruent, you need 3 corresponding congruent parts. One of the angles are already marked congruent for you (<S and <K). Then WJ is equal to itself (reflexive property) and m<SWJ=m<WJK by alternate interior angles. You know this because the sides are parallel, and WJ acts as the transversal. So there you have it. Triangle SJW is congruent to Triangle KJW by AAS.
