PSLE HJKL and JLMN are rhombuses. KPL is a straight line.
- Find ∠LJP.
- Find ∠KLM.
(a)
∠JLK
= (180° - 102°) ÷2
= 78° ÷ 2
= 39° (Isosceles triangle)
∠LJP
= 180° - 128° - 39°
= 13° (Angles sum of triangle)
(b)
∠JNM
= 360° - 296°
= 64° (Angles at a point)
∠JLM = ∠JNM = 64° (Rhombus)
∠KLM
= 64° - 39°
= 25°
Answer(s): (a) 13°; (b) 25°