DEFG is a rectangular piece of paper. Corners F and G are folded upwards as shown. ∠FJK = 20° and ∠GJE = 13 °
- Find ∠FKJ
- Find ∠GJF
(a)
∠FKJ
= 180° - 90° - 20°
= 70° (Angles sum of triangle)
(b)
∠GJF
= 180° - 13° - 13° - 20° - 20°
= 114° (Angles on a straight line)
Answer(s): (a) 70° (b) 114°