In the figure, FGHJ is a parallelogram and KH = KJ.
- Find ∠l.
- Find ∠m.
(a)
∠FKG = ∠FGK (Isosceles triangle)
∠l
= 180° - 45° - 45° - 68°
= 22° (Interior angles)
(b)
∠FKG
= 180° - 45° - 45°
= 90° (Angles sum of triangle)
∠m
= 360° - 90°
= 270° (Angles at a point)
Answer(s): (a) 22°; (b) 270°