The figure shows a parallelogram. Find
- ∠d
- ∠c
- ∠b
(a)
∠FIG
= 180° - 34° - 67°
= 79° (Angles sum of triangle)
∠d = ∠FIG = 79° (Vertically opposite angles)
(b)
∠c = ∠FEG = 59° (Alternate angles)
(c)
∠GIF = ∠d = 79° (Vertically opposite angles)
∠b
= 79° - 59°
= 20° (Exterior angle of a triangle)
Answer(s): (a) 79°; (b) 59°; (c) 20°