A congruence transformation of a shape is one that does not alter the size (area) or the relative lengths and positions of the lines.
Translations, rotations and reflections are all example of simple transformations which are congruent.
Reflecting
This sentence can be complete as: After a congruence transformation the area of a triangle would be the same as it was before.
Stretching
Yes, it is.
Rotation
The size of the shape changes with a similarity transformation (enlargement), whereas it does not with a congruence transformation.
Reflecting
yes
stretching
This sentence can be complete as: After a congruence transformation the area of a triangle would be the same as it was before.
In math, a congruence transformation known as a rotation.
Stretching
unchanged
congruence transformation
Rotation is congruent.
Yes, it is.
It would be left unchanged.