HJKL is a rectangular piece of paper. Corners K and L are folded upwards as shown. ∠KNP = 20° and ∠LNE = 17 °
- Find ∠KPN
- Find ∠LNK
(a)
∠KPN
= 180° - 90° - 20°
= 70° (Angles sum of triangle)
(b)
∠LNK
= 180° - 17° - 17° - 20° - 20°
= 106° (Angles on a straight line)
Answer(s): (a) 70° (b) 106°