Looking at the triangles EDA and FDA, the side DA is a common side to both triangles.
Also, the angles EAD and FAD are congruent, and angles DEA and DFA are also congruent.
Therefore, the triangles are congruent using case AAS (angle-angle-side).
Since corresponding parts of congruent triangles are also congruent, the values of x and y are equal.
So the correct options are:
C - Equal to
B - AAS
A - Corresponding