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?
Answer & explanation
Correct answer: option 4
∠PRS = 180° - ∠PRQ = 120°
In ΔPRS :-
PR = RS
∠P = ∠S = 30°
∠QPR = 120° - ∠RPS = 120° - 30° = 90°
∠PQR = 180° - (90° + 60°) = 30°