Question
The figure is not drawn to scale. It has three parallel lines and two isosceles triangles. ∠b and ∠c are in the ratio of 4 : 5 respectively. Find ∠b + ∠c + ∠d.
3 m

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The figure is not drawn to scale. It has three parallel lines and two isosceles triangles. ∠b and ∠c are in the ratio of 4 : 5 respectively. Find ∠b + ∠c + ∠d.