Triangles jkl and mnr are shown in the diagram. In the diagram, kl is congruent to nr and jl is congruent to mr. What additional information is needed to show that triangle jkl is congruent to triangle mnr by SAS?
1) ∠j is congruent to ∠m
2) ∠l is congruent to ∠r
3) ∠k is congruent to ∠n
4) ∠r is congruent to ∠k
