1. What is the unique about a rigid transformation?

A rigid transformation is always with a square or triangle.

A rigid transformation changes sizes from the pre image to the new image.

In a rigid transformation, the pre image and new image are congruent and the size does not
change.

This means that all distances, angles, and shapes remain the same after the transformation. This property makes rigid transformations useful in geometry and design because they preserve the original structure of an object.