Question

The 2 figures are not/are congruent because non-rigid motions/ only-rigid motions are used to map Figure 1 onto Figure 2

Answer 1

To be congrent two figures need to have corresponding sides with the same measure.

Non-rigid motion or transformations are those that change the structure of a figure

Rigid motion or transformations are those than doesn't change the structure of a figure.

Then, The two figures are congruent because only rigid motion are used to map Figure 1 onto Figure 2.

If you compare the figures you can identify the correspondig points:

W and M

U and N

S and K

T and J

V and L