Geometry

Question Analysis:
This question is about identifying what stays the same after a rotation.
The main focus is on the invariant properties of figures after rotation.

Key Concept Explanation:
Rotations are rigid motions, which means they preserve shape, size, and angle measures.
Coordinates and orientation may change, depending on the angle and location.

Step-by-Step Solution:
A 180° rotation changes all signs: (x, y) → (–x, –y).
That moves the points and can change the quadrant and orientation.
But shape and size remain identical — so answer is B.

Option Analysis:
A. ❌ Coordinates change.
✅ B. Correct — s...