In the figure, not drawn to scale, O is the centre of the semi circle and OABC is a rhombus. ∠OCD = 30°. Find
- ∠v
- ∠w.
(a)
OC = OD = Radius
∠COD
= 180° - 30° - 30°
= 120° (Isosceles triangle)
∠v = ∠COD = 120° (Corresponding angles, AB//OC)
(b)
∠w
= 180° - 120°
= 60° (Interior angles, BC//AO)
Answer(s): (a) 120°; (b) 60°