A rectangular piece of paper was folded as shown.
- Find ∠t
- Find ∠s
(a)
∠t
= (180° - 26°) ÷ 2
= 154° ÷ 2
= 77° (Angles on a straight line)
(b)
180° - 77° - 26° = 77° (Interior angles)
∠s
= 360° - 90° - 77° - 77°
= 116° (Sum of angles in a quadrilateral)
Answer(s): (a) 77°; (b) 116°