Damon already answered this for you.
The sides have not changed length, so the triangles are still congruent.
Think about it. Cut out a triangle and then move it around. Has it changed shape in any way?
On the coordinate plane, ΔABC ≅ ΔDEF by SSS. ΔABC translates 2 units to the left and 3 units down. Do the triangles remain congruent? Explain why or why not.
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