PQRS is a rhombus, LMS and QMR are straight lines. If QM = MS, ∠MSR = 17° and ∠NQR = 28°, find
- ∠MRS
- ∠NLM
(a)
∠MRS
= 88° - 17°
= 71° (Exterior angle of a triangle)
(b)
∠QLM
= 88° - 28°
= 60° (Exterior angle of a triangle)
∠NLM
= 180° - 60°
= 120° (Angles on a straight line)
Answer(s): (a) 71°; (b) 120°