MNPQ is a rectangular piece of paper. Corners P and Q are folded upwards as shown. ∠PST = 18° and ∠QSE = 12 °
- Find ∠PTS
- Find ∠QSP
(a)
∠PTS
= 180° - 90° - 18°
= 72° (Angles sum of triangle)
(b)
∠QSP
= 180° - 12° - 12° - 18° - 18°
= 120° (Angles on a straight line)
Answer(s): (a) 72° (b) 120°