The figure is not drawn to scale. Find
- ∠b
- ∠c
(a)
∠f
= 180° - 105°
= 75° (Angles on a straight line)
∠e
= 180° - 78° - 75°
= 27° (Angles sum of triangle)
∠e = ∠b (Alternate angles)
(b)
∠d
= 180° - 105°
= 75° (Interior angles)
∠d = ∠c = 75° (Corresponding angles)
Answer(s): (a) 27°; (b) 75°