In the figure, RTV and STU are straight lines. TR = TS and UT = UV. If ∠SRT = 60°, find
- ∠RTU
- ∠TUV
(a)
∠RTU
= 60° + 60°
= 120° (Exterior angle of a triangle)
(b)
∠UTV
= 180° - 120°
= 60° (Angles on a straight line)
∠TUV
= 180° - 60° - 60°
= 60° (Isosceles triangle)
Answer(s): (a) 120°; (b) 60°