An equilateral triangle, ZAB, is folded as shown in the figure. Find
- ∠CBB
- ∠ACB.
(a)
∠BBC = 60° (Equilateral triangle ZAB)
∠CBB
= 180° - 60° - 54° (Angles sum of triangle)
= 66°
(b)
∠ACB
= 180° - 54° - 54°
= 72° (Angles on a straight line)
Answer(s): (a) 66°; (b) 72°