PSLE GHJK is a trapezium with GH parallel to KJ. GMH and LMK are straight lines and GL = LH. ∠LGK = 98°.
- Find ∠GKM.
- Find ∠HLM.
(a)
∠GKM
= 180° - 98° - 29°
= 53° (Angles sum of triangle)
(b)
∠GMK
= 69° (Alternate angles)
∠HGL
= 69° - 29°
= 40° (Exterior angle of a triangle)
∠HLM
= 180° - 40° - 40° - 29°
= 71° (Angles sum of triangle)
Answer(s): (a) 53°; (b) 71°