In the figure, HJ = HL, ∠JHL = 32° and ∠MKL = 12°. Find
- ∠i
- ∠j
(a)
∠HJL
= (180° - 32°) ÷ 2
= 74° (Isosceles triangle)
∠i
= 180° - 12° - 74°
= 94° (Angles sum of triangle)
(b)
∠HLK
= 180° - 74°
= 106° (Angles on a straight line)
∠j
= 12° + 106°
= 118° (Exterior angle of a triangle)
Answer(s): (a) 94°; (b) 118°