Question

triangle def is congruent to △ghj by the sss theorem. which rigid transformation is required to map △def onto △ghj? dilation reflection rotation translation

Explanation:

Step1: Recall rigid transformation definitions

• Dilation changes size (not rigid).
• Reflection flips over a line.
• Rotation turns around a point.
• Translation slides without rotation/flip.

Step2: Analyze triangle orientation

$\triangle DEF$ and $\triangle GHJ$ are mirror - images (orientation reversed).

Answer:

reflection