Shonda was curious if segments \overline{WX} WX start overline, W, X, end overline and \overline{YZ} YZ start overline, Y, Z, end overline were congruent, so she tried to map one figure onto the other using transformations: Shonda concluded: "It's not possible to map \overline{WX} WX start overline, W, X, end overline onto \overline{YZ} YZ start overline, Y, Z, end overline using a sequence of rigid transformations, so the segments are not congruent." What error did Shonda make in her conclusion?