ABCD is a rhombus. ADE is an equilateral triangle. Find
- ∠EAB
- ∠ABD
(a)
∠EAD
= 180° ÷ 3
= 60° (Equilateral triangle)
∠BAD = ∠BCD = 114° (Rhombus)
∠EAB
= 114° + 60°
= 174°
(b)
∠ABD
= (180° - 114°) ÷ 2
= 33° (Isosceles triangle)
Answer(s): (a) 174°; (b) 33°