Given that CDEF is a rhombus, calculate
- ∠k
- ∠l
(a)
∠CGF = ∠DGH = 98° (Vertically opposite angles)
∠k
= 180° - 98° - 11°
= 71° (Angles sum of triangle)
(b)
∠FED
= 180° - 11° - 11°
= 158° (Angles sum of triangle)
∠l
= 360° - 98° - 158° - 11°
= 93° (Sum of Angles in a quadrilateral)
Answer(s): (a) 71°; (b) 93°