Question

two rigid transformations are used to map △abc to △qrs. the first is a translation of vertex b to vertex r. what is the second transformation? a reflection across the line containing ab a rotation about point b a reflection across the line containing cb a rotation about point c

Explanation:

A translation moves a figure without rotation or reflection. After translating vertex B to vertex R, to map the rest of the triangle correctly, we need to rotate the triangle about the translated - point (which was B and is now at R). Rotating about point B (which has been translated to R) will align the other vertices and angles of the two triangles.

Answer:

a rotation about point B