An equilateral triangle, STU, is folded as shown in the figure. Find
- ∠NMU
- ∠TNU.
(a)
∠MUN = 60° (Equilateral triangle STU)
∠NMU
= 180° - 60° - 54° (Angles sum of triangle)
= 66°
(b)
∠TNU
= 180° - 54° - 54°
= 72° (Angles on a straight line)
Answer(s): (a) 66°; (b) 72°