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