Question

1. what is a key feature of a shape after it undergoes a rigid transformation?

a. it maintains congruence.
b. it rotates.
c. it is scaled.
d. it changes size.

Explanation:

A rigid transformation (translation, rotation, reflection) preserves the size and shape of a figure, which means the pre - image and image are congruent. Rotation is just one type of rigid transformation. Scaling and changing size are not part of rigid transformations as they change the dimensions of the figure.

Answer:

A. It maintains congruence.