ΔMPN ≅ ΔSQR
Two triangles are congruent if pairs of corresponding sides and corresponding angles are equal.
If we write ΔMPN ≅ ΔSQR, it would mean that,
Correspondence between vertices:
M ↔ S, P ↔ Q, N ↔ R
Correspondence between sides:
MP = SQ, PN = QR, MN = SR
Correspondence between angles:
∠M = ∠S, ∠P = ∠Q, ∠N = ∠R