The figure is made up of straight lines. Given that ∠a is twice that of ∠c, find
- ∠a
- ∠b
- ∠c
(a)
∠a = 86° (Vertically opposite angles)
(b)
∠b
= 180° - 86° - 43°
= 51° (Angles on a straight line)
(c)
∠c
= 86° ÷ 2
= 43°
Answer(s):(a) 86°; (b) 51°; (c) 43°