PSLE CDEF is a trapezium with CD parallel to FE. CHD and GHF are straight lines and CG = GD. ∠GCF = 92°.
- Find ∠CFH.
- Find ∠DGH.
(a)
∠CFH
= 180° - 92° - 26°
= 62° (Angles sum of triangle)
(b)
∠CHF
= 69° (Alternate angles)
∠DCG
= 69° - 26°
= 43° (Exterior angle of a triangle)
∠DGH
= 180° - 43° - 43° - 26°
= 68° (Angles sum of triangle)
Answer(s): (a) 62°; (b) 68°