Geometry

Question Analysis:
This question tests understanding of triangle congruence and what it implies.
The main focus is on the corresponding parts of congruent triangles (CPCTC), which states that if two triangles are congruent, then their corresponding sides and angles must be equal.

Key Concept Explanation:
When two triangles are congruent (△ABC≅△DEF), their corresponding sides and angles are identical in measure.
The notation △ABC≅△DEF means:
Corresponding angles: ∠A = ∠D, ∠B = ∠E, ∠C = ∠F
Corresponding sides: AB = DE, BC = EF, AC = DF
This follows from the definition of congruent triangles: two triangles are congruent if and only if all their corresponding sides and angles match exactly.

Step-by-Step Solution:
Option A: ∠A = ∠D, ∠B = ∠E, ∠C = ∠F
This is correct because corresponding angles of congruent triangles are always equal.
Option B: AB = DE, BC = EF, AC = DF
This is also correct because corresponding sides of congruent triangles must be equal.
Option C: Both A and B
Since both previous statements are correct, this is the right answer.
Option D: None of the above
This is incorrect because we have already shown that both A and B are true.

Common Mista...