CDEF is a rectangular piece of paper. Corners E and F are folded upwards as shown. ∠EHJ = 18° and ∠FHE = 12 °
- Find ∠EJH
- Find ∠FHE
(a)
∠EJH
= 180° - 90° - 18°
= 72° (Angles sum of triangle)
(b)
∠FHE
= 180° - 12° - 12° - 18° - 18°
= 120° (Angles on a straight line)
Answer(s): (a) 72° (b) 120°