GHJK is a rectangular piece of paper. Corners J and K are folded upwards as shown. ∠JMN = 19° and ∠KME = 11 °
- Find ∠JNM
- Find ∠KMJ
(a)
∠JNM
= 180° - 90° - 19°
= 71° (Angles sum of triangle)
(b)
∠KMJ
= 180° - 11° - 11° - 19° - 19°
= 120° (Angles on a straight line)
Answer(s): (a) 71° (b) 120°