Answer:
BC≅QR.
Explanation:
The triangles are congruent so they are exactly the same in size and shape. Sides BC and QR are corresponding sides in the triangles so they are also congruent.
QR would go in the box
The QR goes in the box because it is saying triangle ABC ≅ triangle PQR
The letters have to be in the same order
BC are the last two of ABC and QR are the last two of PQR
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