The figure is made up of straight lines. Given that ∠a is thrice that of ∠c, find
- ∠a
- ∠b
- ∠c
(a)
∠a = 78° (Vertically opposite angles)
(b)
∠b
= 180° - 78° - 26°
= 76° (Angles on a straight line)
(c)
∠c
= 78° ÷ 3
= 26°
Answer(s):(a) 78°; (b) 76°; (c) 26°