Which theorem or postulate proves the triangles are congruent?
a) aas
b) asa
c) hl
d) sas

A) AAS proves that the two triangles are congruent.

We know that JNK = MLK and KJ = KM because these are given to us.

We know that the angles NKJ and LKM are equal because the lines NL and JM intersect creating a cross. I forget what theorem states that but AAS (Angle Angle Side) is your answer.