MNPQ is a rectangular piece of paper. Corners P and Q are folded upwards as shown. ∠PST = 23° and ∠QSE = 18 °
- Find ∠PTS
- Find ∠QSP
(a)
∠PTS
= 180° - 90° - 23°
= 67° (Angles sum of triangle)
(b)
∠QSP
= 180° - 18° - 18° - 23° - 23°
= 98° (Angles on a straight line)
Answer(s): (a) 67° (b) 98°