The figure is made up of straight lines. Given that ∠j is four times that of ∠m, find
- ∠j
- ∠k
- ∠m
(a)
∠j = 80° (Vertically opposite angles)
(b)
∠k
= 180° - 80° - 20°
= 80° (Angles on a straight line)
(c)
∠m
= 80° ÷ 4
= 20°
Answer(s):(a) 80°; (b) 80°; (c) 20°