Given the triangles CDE and JLM
For the triangles we have the following:
1) CD = JL
2) CE = JM
3) DE = LM
So, there 3 pairs of congruent sides
So, the triangles are congrurent by S.S.S ( Side-Side-Side) postulate
C is corresponding to J
D is corresponding to L
E is corresponding to M
So,
For marking the triangles, see the following figure: