The figure is not drawn to scale. Find
- ∠f
- ∠g
(a)
∠j
= 180° - 100°
= 80° (Angles on a straight line)
∠i
= 180° - 77° - 80°
= 23° (Angles sum of triangle)
∠i = ∠f (Alternate angles)
(b)
∠h
= 180° - 100°
= 80° (Interior angles)
∠h = ∠g = 80° (Corresponding angles)
Answer(s): (a) 23°; (b) 80°