In equilateral ΔPQR, S and T are points on the sides PQ and PR respectively, such that PS = TR, QT and SR intersect at Z. The measure of ∠QZR is?
Answer & explanation
Correct answer: option 3
ΔRQT ≅ ΔPRS
∴ SP = TR
∠QRT = ∠SPR = 60°
⇒ QT = SR
S and T are midpoints
∠TQR = ∠QRS = 30°
∠QZR = 180° - 30° - 30° = 120°