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in Mathematics by (30.0k points)

The following figure shows a quadrilateral in which sides AB and DC are parallel. If ∠A : ∠D = 4 : 5, ∠B = (3x – 15)° and ∠C = (4x + 20)°, find each angle of the quadrilateral ABCD.

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and ∠C = 4 (25) + 20 = 100°+ 20°= 120°

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