A rectangular piece of paper was folded as shown.
- Find ∠m
- Find ∠z
(a)
∠m
= (180° - 22°) ÷ 2
= 158° ÷ 2
= 79° (Angles on a straight line)
(b)
180° - 79° - 22° = 79° (Interior angles)
∠z
= 360° - 90° - 79° - 79°
= 112° (Sum of angles in a quadrilateral)
Answer(s): (a) 79°; (b) 112°