Question

triangle abc is congruent to △abc by the hl theorem. what single rigid transformation maps △abc onto △abc? translation rotation reflection dilation

Explanation:

A reflection is a rigid - transformation that flips a figure over a line of reflection. In the case of two congruent right - triangles like $\triangle ABC$ and $\triangle A'B'C'$, a reflection can map one onto the other. A translation slides a figure, a rotation turns a figure around a point, and a dilation changes the size of a figure (non - rigid). Since we want a rigid transformation and the orientation of the triangles seems to be flipped, reflection is the correct answer.

Answer:

C. reflection