DEFG is a rhombus. DGH is an equilateral triangle. Find
- ∠HDE
- ∠DEG
(a)
∠HDG
= 180° ÷ 3
= 60° (Equilateral triangle)
∠EDG = ∠EFG = 114° (Rhombus)
∠HDE
= 114° + 60°
= 174°
(b)
∠DEG
= (180° - 114°) ÷ 2
= 33° (Isosceles triangle)
Answer(s): (a) 174°; (b) 33°