The figure shows a parallelogram. Find
- ∠c
- ∠b
- ∠a
(a)
∠EHF
= 180° - 34° - 60°
= 86° (Angles sum of triangle)
∠c = ∠EHF = 86° (Vertically opposite angles)
(b)
∠b = ∠EDF = 51° (Alternate angles)
(c)
∠FHE = ∠c = 86° (Vertically opposite angles)
∠a
= 86° - 51°
= 35° (Exterior angle of a triangle)
Answer(s): (a) 86°; (b) 51°; (c) 35°