Question
The figure is not drawn to scale. ∠c and ∠a are in the ratio 1 : 4. ∠b and ∠d are in the ratio 4 : 1. If ∠a = 100°, find ∠d.
3 m

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The figure is not drawn to scale. ∠c and ∠a are in the ratio 1 : 4. ∠b and ∠d are in the ratio 4 : 1. If ∠a = 100°, find ∠d.