HJKL is a parallelogram. HLM and JNM are straight lines. Find the values of
- ∠b
- ∠e
- ∠d
- ∠c
(a)
∠b
= 180° - 51° - 57°
= 72° (Interior angles)
(b)
∠NHJ = ∠NJH = 51° (Isosceles triangle)
∠e
= 180° - 57° - 51° - 51°
= 21° (Interior angles)
(c)
∠d
= 180° - 51° - 51°
= 78° (Isosceles triangle)
(d)
∠c = 57° (Alternate angles)
Answer(s): (a) 72°; (b) 21°; (c) 78°; (d) 57°