In ΔPQR, the side QR is extended to S such that RS = PR.  If ∠QPS = 120° and ∠PRQ = 60°, then the value of ∠PQR is?

70° 100° 150° 30°

30°

∠PRS = 180° - ∠PRQ = 120° In ΔPRS :- PR = RS ∠P = ∠S = 30° ∠QPR = 120° - ∠RPS =  120° - 30° = 90° ∠PQR = 180° - (90° + 60°) = 30°