In a quadrilateral ABCD, if ∠A = 80°, ∠B = 100°, ∠C = 50°, then ∠D = ___?

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In a quadrilateral ABCD, if ∠A = 80°, ∠B = 100°, ∠C = 50°, then ∠D = ___?
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  2. In a quadrilateral ABCD if ∠A = 80° ∠B = 100° ∠C = 50° then ∠D = ___?
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