Answer:
QR would go in the box
Step-by-step explanation:
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
BC≅QR.
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.
