The figure is not drawn to scale. Find
- ∠r
- ∠s
(a)
∠w
= 180° - 102°
= 78° (Angles on a straight line)
∠v
= 180° - 79° - 78°
= 23° (Angles sum of triangle)
∠v = ∠r (Alternate angles)
(b)
∠t
= 180° - 102°
= 78° (Interior angles)
∠t = ∠s = 78° (Corresponding angles)
Answer(s): (a) 23°; (b) 78°