Original sentence: In Euclidean geometry, when not a translation, there is a unique number c by which distances in the dilatation are multiplied.Typical examples of dilatations are translations, half-turns, and the identity transformation
Edited sentence: Congruent examples of dilatations are translations, rotations, reflections, and the identity transformation.In Euclidean geometry, when not a congruence, there is a unique number c by which distances in the dilatation are multiplied