In the figure, NPQ and QRS are isosceles triangles where NQ = PQ and QR = QS. Given that RT, SV and NX are straight lines, find
- ∠UYX
- ∠STY
(a)
∠NPQ = ∠PNQ = ∠QRS = ∠QSR (Isosceles triangle)
∠QSR = ∠TSY = 35° (Verticallly opposite angles)
∠VSY
= 35° - 15°
= 20°
∠SUY
= 180° - 101°
= 79° (Angles on a straight line)
∠UYX
= 79° + 20°
= 99° (Exterior angle of a triangle)
(b)
∠STY
= 99° - 35°
= 64° (Exterior angle of a triangle)
Answer(s): (a) 99°; (b) 64°