What type of transformation is shown below?AсBРB'A'a 90° rotation about point P.a 180° rotation about point P.a reflection across line l.O a translation across line l.

ANSWER
A reflection across the line l
EXPLANATION
We want to identify the type of transformation that occurred in the diagram given.
From the diagram, we see that each corresponding point in triangles ABC and A'B'C' is equidistant from line l, and is also on opposite sides of the line.
This means that the transformation that occurred is a reflection across the line l.