In the figure, FGHJ is a parallelogram and KH = KJ.
- Find ∠l.
- Find ∠m.
(a)
∠FKG = ∠FGK (Isosceles triangle)
∠l
= 180° - 40° - 40° - 69°
= 31° (Interior angles)
(b)
∠FKG
= 180° - 40° - 40°
= 100° (Angles sum of triangle)
∠m
= 360° - 100°
= 260° (Angles at a point)
Answer(s): (a) 31°; (b) 260°