An equilateral triangle, ZAB, is folded as shown in the figure. Find
- ∠UTB
- ∠AUB.
(a)
∠TBU = 60° (Equilateral triangle ZAB)
∠UTB
= 180° - 60° - 57° (Angles sum of triangle)
= 63°
(b)
∠AUB
= 180° - 57° - 57°
= 66° (Angles on a straight line)
Answer(s): (a) 63°; (b) 66°