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 what is a parrellogram

A quadrilateral is a parallelogram if a pair of opposite sides are equal and parallel..

Here, ABCD and LDMB are parallelograms.

Properties of Parallelogram:-

1. Opposite sides of a parallelogram are equal and parallel to each other.

2. Opposite angles of a parallelogram are equal.

3. Diagonals of a parallelogram always bisect each other.

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Hi Kushal, me Arpita & i am feeling happy healping u.Parrellogram is a quadrilateral with each pair of  opposite sides parallel.Its opposite sides &angles are equal. Its diagonals bisect  each other too. 

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In Euclidean geometry, a parallelogram is a simple (non self-intersecting) quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure. The congruence of opposite sides and opposite angles is a direct consequence of the Euclidean Parallel Postulate and neither condition can be proven without appealing to the Euclidean Parallel Postulate or one of its equivalent formulations. The three-dimensional counterpart of a parallelogram is a parallelopiped.

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