Geometry

Question Analysis:
This question tests understanding of corresponding vs. non-corresponding parts.

Key Concept Explanation:
Congruency ensures correspondence in naming order: A↔D, B↔E, C↔F.

Step-by-Step Solution:
A↔D: DE = AB = 8 cm (A is true).
∠A ↔ ∠D: m∠D = 30° (B is true).
BC ↔ EF: BC = EF (C is true).
AC ↔ DE is false (should be AC ↔ DF).

Opti...