An equilateral triangle, DEF, is folded as shown in the figure. Find
- ∠FEF
- ∠EFF.
(a)
∠EFF = 60° (Equilateral triangle DEF)
∠FEF
= 180° - 60° - 55° (Angles sum of triangle)
= 65°
(b)
∠EFF
= 180° - 55° - 55°
= 70° (Angles on a straight line)
Answer(s): (a) 65°; (b) 70°