PSLE In the figure, KLQR is a parallelogram and MNPQ is a rhombus. RQP is a straight line. ∠LKR = 57°, ∠QLM = 28° and ∠NMP = 33°.
- Find ∠LQM.
- Find ∠LMN.
(a)
∠LQR
= ∠LKR
= 57° (Parallelogram)
∠NPM
= ∠NMP
= 33° (Isosceles triangle)
∠MNP
= 180° - 33° - 33°
= 105° (Angles sum of triangle)
∠MQP
= ∠MNP
= 105° (Rhombus)
∠LQM
= 180° - 57° - 105°
= 18° (Angles on a straight line)
(b)
∠LMQ
= 180° - 28° - 18°
= 134° (Angles sum of triangle)
∠PMQ
= ∠NMP
= 33° (Rhombus)
∠LMN
= 360° - 134° - 33° - 33°
= 160° (Angles at a point)
Answer(s): (a) 18°; (b) 160°