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Grade 128 grade maths

Can a quadrilateral ABCD be a parallelogram if ∠D + ∠B = 180°?

Profile image of Pawan Prajapati
5 Years agoGrade 12
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1 Answer

Profile image of Harshit Singh
5 Years ago
Dear Student

Yes, a quadrilateral ABCD be a parallelogram if ∠D + ∠B = 180° but it shouldalso fulfilled some conditions which are:
(a) The sum of the adjacent angles should be 180°.
(b) Opposite angles must be equal.

Thanks