Question

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

Explanation:

Step1: Recall rigid - transformation properties

Rigid transformations include translation, rotation, and reflection and preserve shape and size. Dilation is not a rigid - transformation as it changes the size.

Step2: Analyze the transformation

If we observe the triangles $\triangle ABC$ and $\triangle A'BC'$, we can see that they are mirror - images of each other with respect to a line passing through point $B$. A reflection is a transformation that flips a figure over a line of reflection.

Answer:

reflection