The set of transformation from triangle ABC to triangle A'B'C' are
Reflection across x-axis
Reflection across line x = -2.5
What is reflection?
A reflection is a type of transformation that flips an object over a line, creating its mirror image.
The line over which the reflection occurs is called the line of reflection.
When the line of reflection is the x axis the image is mirrored down. A further reflection of line of reflection at x = -2.5 maps the triangle ABC to A'B'C'