Final answer:
The rigid transformation required to map Triangle DEF onto Triangle GHJ is a translation.
Step-by-step explanation:
The rigid transformation required to map Triangle DEF onto Triangle GHJ is a translation.
A translation is a transformation that moves every point of a figure the same distance in the same direction. In this case, Triangle DEF is shifted down and to the right to form Triangle GHJ, which can be achieved by a translation.
Translation does not change the shape or size of the figure, only its position in the coordinate plane.