After a reflection, segments are drawn between corresponding points on the image of a triangle and its preimage. What is the relationship between all of these segments?

In a reflection, each point and its image lie on opposite sides of the line of reflection, and the segment joining them is perpendicular to that line. Since all the corresponding-point segments are perpendicular to the same line, they are parallel to one another. So the best answer is B, “They are parallel.”

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