The figure is made up of straight lines. Given that ∠d is thrice that of ∠f, find
- ∠d
- ∠e
- ∠f
(a)
∠d = 81° (Vertically opposite angles)
(b)
∠e
= 180° - 81° - 27°
= 72° (Angles on a straight line)
(c)
∠f
= 81° ÷ 3
= 27°
Answer(s):(a) 81°; (b) 72°; (c) 27°