The figure shows a parallelogram. Find
- ∠c
- ∠b
- ∠a
(a)
∠EHF
= 180° - 38° - 60°
= 82° (Angles sum of triangle)
∠c = ∠EHF = 82° (Vertically opposite angles)
(b)
∠b = ∠EDF = 67° (Alternate angles)
(c)
∠FHE = ∠c = 82° (Vertically opposite angles)
∠a
= 82° - 67°
= 15° (Exterior angle of a triangle)
Answer(s): (a) 82°; (b) 67°; (c) 15°