Geometry

Question Analysis：
This question evaluates the application of glide reflection in a coordinate context.
The main focus is on checking the alignment of the translation vector with the reflection line.

Key Concept Explanation：
The line y = 2 is horizontal.
The translation vector ⟨4, 0⟩ is also horizontal → direction is parallel.
Reflection + parallel translation = glide reflection

Step-by-Step Solution：
Black triangle with vertices at (1, 2), (2, 4), and (3, 2)
Red triangle with vertices at (5, 2), (6, 0), and (7, 2)
(1, 2) to (5, 2): 5 = 1 + 4; 2 = 2 * 2 - 2 (same as other points)
Reflect over y = 2 → all points reflected across a horizontal line
Translate by ⟨4, 0⟩ → rightward motion, horizontal → parallel to y = 2
Satisfies the conditions for a glide reflection

Option Analysis：
A – Incomp...