Geometry

Question Analysis:
This question evaluates conceptual understanding of reflection properties, including coordinate changes, distance preservation, and orientation effects.

Key Concept Explanation:
Reflection across the x-axis follows these rules:
x-coordinate remains the same (A is true).
y-coordinate flips sign (B is true).
It is a rigid transformation, so distances are preserved (C is true).
Orientation is reversed (D is false).
A reflection is not equivalent to a 180° rotation (E is false).

Step-by-Step Solution:
A) Correct. The x-coordinate stays the same.
B) Correct. The y-coordinate changes sign (e.g., (2, 3) → (2, -3)).
C) Correct. Reflections preserve distances (isometry).
D) Incorrect. Orientation flips (e.g., a clockwise triangle ...