Home  >  Class 9 Math  >  Class 9 Maths Practice Test: Quadrilaterals - Angle Sum Property of a Quadrilateral

Find the value of x and y.

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∠D + ∠A + ∠C + ∠B = 360°. Or, the sum of angles of a quadrilateral is 360°.

This is the angle sum property of quadrilaterals.


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