LMNP is a rectangular piece of paper. Corners N and P are folded upwards as shown. ∠NRS = 20° and ∠PRE = 16 °
- Find ∠NSR
- Find ∠PRN
(a)
∠NSR
= 180° - 90° - 20°
= 70° (Angles sum of triangle)
(b)
∠PRN
= 180° - 16° - 16° - 20° - 20°
= 108° (Angles on a straight line)
Answer(s): (a) 70° (b) 108°