Question

the triangles are congruent by the sss congruence theorem. which rigid transformation(s) can map △abc onto △dec? reflection, then rotation reflection, then translation rotation, then translation rotation, then dilation

Explanation:

Rigid transformations preserve the size and shape of a figure. Dilations are not rigid transformations as they change the size. First, a rotation can be used to align the orientation of △ABC with △DEC, and then a translation can be used to move △ABC to exactly overlap △DEC.

Answer:

rotation, then translation