The figure is not drawn to scale. Find
- ∠c
- ∠d
(a)
∠g
= 180° - 100°
= 80° (Angles on a straight line)
∠f
= 180° - 80° - 80°
= 20° (Angles sum of triangle)
∠f = ∠c (Alternate angles)
(b)
∠e
= 180° - 100°
= 80° (Interior angles)
∠e = ∠d = 80° (Corresponding angles)
Answer(s): (a) 20°; (b) 80°