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