PSLE STUV and TVWX are rhombuses. UYV is a straight line.
- Find ∠VTY.
- Find ∠UVW.
(a)
∠TVU
= (180° - 96°) ÷2
= 84° ÷ 2
= 42° (Isosceles triangle)
∠VTY
= 180° - 121° - 42°
= 17° (Angles sum of triangle)
(b)
∠TXW
= 360° - 303°
= 57° (Angles at a point)
∠TVW = ∠TXW = 57° (Rhombus)
∠UVW
= 57° - 42°
= 15°
Answer(s): (a) 17°; (b) 15°