Trapezium is a quadrilateral with
one pair of opposite sides parallel
Here, AB ∥ CD
Thus, sum of adjacent angles in trapezium is 180°
Property:
Adjacent angles of Trapezium are supplementary
i.e. ∠ A + ∠ D = 180°
∠ B + ∠ C = 180°
Let’s look at its proof
Thus, sum of adjacent angles in trapezium is 180°
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