The figure is not drawn to scale. Find
- ∠n
- ∠p
(a)
∠s
= 180° - 100°
= 80° (Angles on a straight line)
∠r
= 180° - 81° - 80°
= 19° (Angles sum of triangle)
∠r = ∠n (Alternate angles)
(b)
∠q
= 180° - 100°
= 80° (Interior angles)
∠q = ∠p = 80° (Corresponding angles)
Answer(s): (a) 19°; (b) 80°