Geometry

Question Analysis：
This question tests the student's ability to determine whether the translation is parallel to the reflection line.
The main focus is understanding directional relationships between vector and reflection line.

Key Concept Explanation：
Glide reflection = reflection + translation parallel to the reflection line
x = 3 is a vertical line
Translation ⟨-5, 0⟩ = horizontal → direction is perpendicular to the mirror line

Step-by-Step Solution：
Reflection over vertical line → line direction is up-down
Translation vector moves left 5 units → horizontal
Since horizontal ≠ vertical, translation is perpendicular
→ Not a glide reflection

Option Analysis：
A – Incorrect: this is not a rotation
B – Incorrect: translation is not parallel
C – Correct: perpendicular tr...