An equilateral triangle, STU, is folded as shown in the figure. Find
- ∠CBU
- ∠TCU.
(a)
∠BUC = 60° (Equilateral triangle STU)
∠CBU
= 180° - 60° - 57° (Angles sum of triangle)
= 63°
(b)
∠TCU
= 180° - 57° - 57°
= 66° (Angles on a straight line)
Answer(s): (a) 63°; (b) 66°