A rectangular piece of paper was folded as shown.
- Find ∠m
- Find ∠f
(a)
∠m
= (180° - 24°) ÷ 2
= 156° ÷ 2
= 78° (Angles on a straight line)
(b)
180° - 78° - 24° = 78° (Interior angles)
∠f
= 360° - 90° - 78° - 78°
= 114° (Sum of angles in a quadrilateral)
Answer(s): (a) 78°; (b) 114°