In the figure, RTV and STU are straight lines. TR = TS and UT = UV. If ∠SRT = 55°, find
- ∠RTU
- ∠TUV
(a)
∠RTU
= 55° + 55°
= 110° (Exterior angle of a triangle)
(b)
∠UTV
= 180° - 110°
= 70° (Angles on a straight line)
∠TUV
= 180° - 70° - 70°
= 40° (Isosceles triangle)
Answer(s): (a) 110°; (b) 40°