CPM Homework Help : CCG Problem 8-88

For each pair of triangles below, decide if the triangles are congruent. If the triangles are congruent:

State which triangle congruence property proves that the triangles are congruent.
Write a congruence statement (such as $\Delta ABC \cong \Delta \text{___}$ ).

Hint (a):
What parts of these triangles makes them congruent? Do they share any parts?
Answer (a):
AAS $\cong$ , $\Delta ABC \cong \Delta DCB$

Hint (b):
Use the same method as part (a), but use a different congruence property.
Are there unmarked corresponding parts that are congruent?