The figure is made up of straight lines. Given that ∠b is thrice that of ∠d, find
- ∠b
- ∠c
- ∠d
(a)
∠b = 84° (Vertically opposite angles)
(b)
∠c
= 180° - 84° - 28°
= 68° (Angles on a straight line)
(c)
∠d
= 84° ÷ 3
= 28°
Answer(s):(a) 84°; (b) 68°; (c) 28°