In the figure, not drawn to scale, O is the centre of the semi circle and OYZA is a rhombus. ∠OAB = 31°. Find
- ∠g
- ∠h.
(a)
OA = OB = Radius
∠AOB
= 180° - 31° - 31°
= 118° (Isosceles triangle)
∠g = ∠AOB = 118° (Corresponding angles, YZ//OA)
(b)
∠h
= 180° - 118°
= 62° (Interior angles, ZA//YO)
Answer(s): (a) 118°; (b) 62°