Question

Is a dilation always an isometry?

Answer 1

No. But dilations with a factor of `1` or `-1` are isometries.

Explanation:

Dilation is a process of converting an object into a similar one with all linear dimensions proportional and angular measures equal.
But, if the factor of proportionality is `1` or `-1`, dimensions will be equal, which is a case of isometry.

Isometry produces congruent objects with all linear dimensions equal and all angular measures equal.