LMNP is a rectangular piece of paper. Corners N and P are folded upwards as shown. ∠NRS = 19° and ∠PRE = 12 °
- Find ∠NSR
- Find ∠PRN
(a)
∠NSR
= 180° - 90° - 19°
= 71° (Angles sum of triangle)
(b)
∠PRN
= 180° - 12° - 12° - 19° - 19°
= 118° (Angles on a straight line)
Answer(s): (a) 71° (b) 118°