Geometry

Question Analysis:
This question uses real-world examples to assess understanding of what qualifies as a rigid motion.
The main focus is distinguishing rigid actions from those that distort or resize a figure.

Key Concept Explanation:
Rigid motions preserve shape and size.
They include:
Translation (sliding)
Rotation (turning)
Reflection (flipping)
Any transformation that stretches or resizes is not rigid.

Step-by-Step Solution:
Sliding = translation
Rotating = rotation
Flipping = reflection
Enlarging/stretching = dilation or shear → not rigid

Option Analysis:
A. Sliding → ✅ Translation = rigid
B. En...