PSLEIn the figure, LMNP is a parallelogram. LJP and JNK are straight lines. ∠KNP = 150°, ∠LPN = 43° and ∠LNJ = 18°.
- Find ∠MNK.
- Find ∠MLN.
(a)
∠MNP
= 180° - 43°
= 137° (Interior angles)
∠MNK
= 360° - 150° - 137°
= 73° (Angles at a point)
(b)
∠PNJ
= 180° - 150°
= 30°(Angles on a straight line)
∠MLN
= ∠LNP
= 30° + 18°
= 48° (Alternate angles)
Answer(s): (a) 73°; (b) 48°