The image of ΔDEF is ΔD'E'F'. Under which transformation

Last updated: 8/6/2022

The image of ΔDEF is ΔD'E'F'. Under which transformation will the triangles not be congruent? (1) a reflection through the origin (2) a reflection over the line y = x (3) a dilation with a scale factor of 1 (4) a dilation with a scale factor of centered at (2,3) centered at the origin