Question

If ∆PQR ≅ ∆MNS, which of the following is true?
1: PQ ≅ MS 2: ∠Q ≅ ∠S
3: QR ≅ NS 4: ∠R ≅ ∠M

Answer 1

QR=NS, because of CPCTC (congruent parts of congruent triangles are congruent)

Answer 2

angree with @lharrell97 :)

Answer 3

basically if the triangles are congruent, then the way they are written is also congruent. so since /_\PQR is congruent to /_\MNS, then P is congruent to M, PQ is congruent to MN, R is congruent to S, etc.