Geometry

Question Analysis
This question involves understanding the logical equivalence of a biconditional statement.
The main focus is on breaking down the "if and only if" statement into its two conditional parts.

Key Concept Explanation:
A biconditional statement is equivalent to combining a conditional statement and its converse.

Step-by-Step Solution:
The original statement is a biconditional: "A triangle is equilateral if and only if it has three equal sides."
This can be split into two parts:
If a triangle is equilateral, then it has three equal sides.
If a triangle has three equal sides, then it is equilateral.
Option C combines these two parts correctly.

Optio...