The figure shows a parallelogram. Find
- ∠e
- ∠d
- ∠c
(a)
∠GJH
= 180° - 30° - 77°
= 73° (Angles sum of triangle)
∠e = ∠GJH = 73° (Vertically opposite angles)
(b)
∠d = ∠GFH = 55° (Alternate angles)
(c)
∠HJG = ∠e = 73° (Vertically opposite angles)
∠c
= 73° - 55°
= 18° (Exterior angle of a triangle)
Answer(s): (a) 73°; (b) 55°; (c) 18°