PSLE PQRS and QSTU are rhombuses. RVS is a straight line.
- Find ∠SQV.
- Find ∠RST.
(a)
∠QSR
= (180° - 110°) ÷2
= 70° ÷ 2
= 35° (Isosceles triangle)
∠SQV
= 180° - 125° - 35°
= 20° (Angles sum of triangle)
(b)
∠QUT
= 360° - 305°
= 55° (Angles at a point)
∠QST = ∠QUT = 55° (Rhombus)
∠RST
= 55° - 35°
= 20°
Answer(s): (a) 20°; (b) 20°