Geometry

Question Analysis:
This question checks understanding of the center of rotation’s role.

Key Concept Explanation:
The center of rotation is the only point that does not move during the transformation.
All other points rotate around it.

Step-by-Step Solution:
By definition, the center of rotation is fixed.
Vertices, midpoints, and diagonal intersections move unless they coincide with the center.

Option Analysis:
A) Incorrect: Vertices move unless they are the center.
B) Incorrect: The midpoint m...