Geometry

Question Analysis:
This tests proper application of AAS to given triangle parts.
The main focus is on:
Verifying BC and EF are non-included sides
Confirming correct angle-side relationships

Key Concept Explanation:
AAS requires:
Two angle pairs
One non-included side pair
BC is opposite ∠A → non-included side

Step-by-Step Solution:
Given two angle pairs (∠A ≅ ∠D, ∠B ≅ ∠E)
BC ≅ EF are sides opposite ∠A and ∠D
BC is not between ∠A and ∠B → qualifies for AAS

Common Mistakes:
Confusing BC with included ...