Geometry

Question Analysis:
This question checks whether the given information satisfies the SAS Congruence Postulate.
The main focus is confirming whether the angle given is between the two sides.

Key Concept Explanation:
SAS (Side-Angle-Side) Congruence Postulate:
Two triangles are congruent if two sides and their included angle are equal.
SSA (Side-Side-Angle) is NOT a valid congruence postulate unless it forms a right triangle (HL case).

Step-by-Step Solution:
Identify Given Information:
AB = DE ✅ (Side)
BC = EF ✅ (Side)
∠ACB = ∠DFE ✅ (Angle)
Check if SAS Applies:
The angle given (∠ACB = ∠DFE) is not the included angle.
Instead, the included angle should be between the two given sides.
Here, the given data forms SSA (Side-Side-Angle), which does not prove triangle congruence in general.
Conclusion:
Since the angle is not between the two given sides, SAS does not apply.
Therefore, we cannot prove △ABC≅△DEF using SAS.