What else would need to be congruent to show that abc is congruent to def by asa?

∠ A ≅ ∠ D

Step-by-step explanation:

We have to prove Δ ABC and Δ DEF are congruent or Δ ABC ≅ Δ DEF applying the Angle-Side-Angle or ASA rule.

In order to maintain the sequence, in ASA rule we have to make congruent two angles and one side in between them.

Therefore, if ∠ B and ∠ E are proved to be congruent and segment AB and segment DE are proved to be congruent, then we have to consider another two angles which must be ∠ A and ∠ D to be congruent.

Therefore, option D is correct. (Answer)

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