In the figure, not drawn to scale, O is the centre of the semi circle and OCDE is a rhombus. ∠OEF = 35°. Find
- ∠e
- ∠f.
(a)
OE = OF = Radius
∠EOF
= 180° - 35° - 35°
= 110° (Isosceles triangle)
∠e = ∠EOF = 110° (Corresponding angles, CD//OE)
(b)
∠f
= 180° - 110°
= 70° (Interior angles, DE//CO)
Answer(s): (a) 110°; (b) 70°