Geometry

Question Analysis:
This question distinguishes between isometries (rigid) and non-isometric transformations (e.g., dilation).

Key Concept Explanation:
Isometry: Preserves both side lengths and angles.
Dilation: Changes size (scales side lengths) but preserves angles.

Step-by-Step Solution:
Note the key detail: side lengths double but angles stay the same.
Eliminate isometries (A/B/D), which preserve side lengths.
Dilation fits because it scales lengths proportionally.

Option Analysis:
A/B/D: Incorrect—these are isometries (no size change).
C: Correct—dilation alters size wh...