Answer:
Hey there!
The error in this congruence statement is that we don't know if these are actually congruent.
Saying that the triangles "look the same" simply isn't enough. We do know that all three angles are the same, but the AAA (Angle Angle Angle) postulate only works for similar triangles.
Additionally, even if they were congruent, it would still be triangle ABC ≅ triangle FED, not triangle DEF.
Let me know if this helps :)
