Question

if pair of opposite angle of quadrilateral are equal ,then prove that it is a parallelogram​

Answer 1

Taking all angles as a , b ,c and d

Theorem 46: If both pairs of opposite sides of a quadrilateral are equal, then it is a parallelogram. Theorem 47: If both pairs of opposite angles of a quadrilateral are equal, then it is a parallelogram. Theorem 48: If all pairs of consecutive angles of a quadrilateral are supplementary, then it is a parallelogram.

Answer 2

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