Question

Which of these triangle pairs can be mapped to each other using a single translation?

Triangles C E D and C N P are congruent. Triangle C E D is rotated about point C and then reflected across a line to form triangle C N P.
Triangles C N E and C E D are congruent. Triangle C N E is reflected across a line and then rotated slightly to form triangle C E D.
Triangles C E D and M D P are congruent. Triangle M D P is rotated and shifted up to form triangle C E D.
Triangles C E D and M P N are congruent. Triangle C E D is shifted to the right to form triangle M P N.

Answer 1

Only the fourth pair: Triangles C E D and M P N.

Reason: a translation is a pure shift (every point moves by the same vector). The fourth description says CED is "shifted to the right" (a translation). The other descriptions include rotations and/or reflections, which are not translations.