The figure shows a parallelogram. Find
- ∠c
- ∠b
- ∠a
(a)
∠EHF
= 180° - 35° - 75°
= 70° (Angles sum of triangle)
∠c = ∠EHF = 70° (Vertically opposite angles)
(b)
∠b = ∠EDF = 50° (Alternate angles)
(c)
∠FHE = ∠c = 70° (Vertically opposite angles)
∠a
= 70° - 50°
= 20° (Exterior angle of a triangle)
Answer(s): (a) 70°; (b) 50°; (c) 20°