The figure is made up of straight lines. Given that ∠d is twice that of ∠f, find
- ∠d
- ∠e
- ∠f
(a)
∠d = 80° (Vertically opposite angles)
(b)
∠e
= 180° - 80° - 40°
= 60° (Angles on a straight line)
(c)
∠f
= 80° ÷ 2
= 40°
Answer(s):(a) 80°; (b) 60°; (c) 40°