Answer: ΔDEB ≅ ΔCEA; SAS
Explanation:
Using the diagram below, we can see that these two triangles share an angle, meaning that angle in both triangles is congruent. Next, we see dashed lines representing congruence for two of the other sides. This means these two triangles are proved congruent by SAS;
S = Side
A = Angle
S = Side
See attached for a visual.