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