Question

1. which of the following is not a rigid transformation?

rotation
translation
dilation
reflection

Explanation:

A rigid transformation preserves the shape and size (side lengths, angles) of a figure. Rotation, translation, and reflection all keep the figure's size and shape unchanged. Dilatation (dilation) changes the size of the figure by a scale factor, so it is not a rigid transformation.

Answer:

C. dilation