In equilateral ΔPQR, S and T are points on the PQ and PR, respectively, such that PS = RT. QT and RS intersect at O. The measure of ∠ROQ is ?
Answer & explanation
Correct answer: option 4
ΔRQT ≅ ΔPRS
∴ PS = RT
∠QRT = ∠SPR = 60°
QT = SR
∴ S and T are mid points
∠TQR = ∠QRS = 30°
∠QOR = 180° - 30° - 30° = 120°