In the diagram shown, DEF is a right-angled triangle and DE = EF = DG. Find
- ∠GDF
- ∠DGE
(a)
∠DFE
= (180° - 90°) ÷ 2
= 45° (Isosceles triangle)
∠GDF
= 45° - 31°
= 14°
(b)
∠DGE
= (180° - 31°) ÷ 2
= 74.5° (Isosceles triangle)
Answer(s): (a) 14°; (b) 74.5°