Geometry

Question Analysis:
This question asks about the properties and effects of rigid motions.
The main focus is on identifying what is always preserved and what may change.

Key Concept Explanation:
Rigid motions result in figures that are congruent to their pre-image.
They may change position and sometimes orientation (as in reflection), but size and angle measures remain unchanged.
Coordinates change unless the motion is identity (no movement).

Step-by-Step Solution:
Congruence is always preserved → A
Position may change → B
Size is preserved → C
Coordinates often change → D ❌
Orientation is not always preserved (e.g., reflection) → E ❌

Option Analysis:
A. Congruence → ✅ Always true
B. Position → ✅ Rig...