Geometry

Question Analysis:
This question tests understanding of proof structure and the SSS Postulate.

Key Concept Explanation:
SSS (Side-Side-Side) states that if three sides of one triangle match three sides of another, the triangles are congruent.
The proof needs a logical step connecting given side congruences to triangle congruence.

Step-by-Step Solution:
Given three pairs of congruent sides → Use SSS.
Missing statement should assert that three equal sides imply congruence → C is correct.

Option Analysis:
(A) ∠B ≅ ∠E: ❌ Irrelevant for SSS.
(B) ∠C ≅ ∠F: ❌ Not needed for SSS.
(C) Triangles with three equal sides are congruent: ✅ Correct; this is th...