Concept:In an enlargement, corresponding sides are the sides opposite corresponding equal angles.Explanation:In △QST, side QT is the hypotenuse because it is opposite the right angle at S.In the enlarged triangle △QRT, the hypotenuse is the side opposite the right angle.From the diagram, the hypotenuse of △QRT is TR.So the side of △QRT that matches QT of △QST is TR.Answer:B. TR