ABCD is a rectangular piece of paper. Corners C and D are folded upwards as shown. ∠CFG = 18° and ∠DFE = 16 °
- Find ∠CGF
- Find ∠DFC
(a)
∠CGF
= 180° - 90° - 18°
= 72° (Angles sum of triangle)
(b)
∠DFC
= 180° - 16° - 16° - 18° - 18°
= 112° (Angles on a straight line)
Answer(s): (a) 72° (b) 112°