An equilateral triangle, CDE, is folded as shown in the figure. Find
- ∠SRE
- ∠DSE.
(a)
∠RES = 60° (Equilateral triangle CDE)
∠SRE
= 180° - 60° - 53° (Angles sum of triangle)
= 67°
(b)
∠DSE
= 180° - 53° - 53°
= 74° (Angles on a straight line)
Answer(s): (a) 67°; (b) 74°