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