Question

Describe fully the single transformation that maps triangle $S$ onto triangle $T$.

Answer 1

Here the triangle $S$ is reflection to the triangle $T$.
Co-ordinates of $S:(2,4),(4,4),(4,5)$
Co-ordinates of $T:(2,1),(4,1),(4,2)$
So, reflection: $(x,y)$ $\mapsto$ $(x=x,y-3)$