by proofing what we can proof that a parallelogram is a rectangle
akshitattls:
all angles are at 90° the diagonals are equal and bisect each other
and the sides of a rectangle are parallel , if we proof that the alternate angles of a rectangle are equal actually we can proof that the sides of a rectangle are parallel...
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Answer:
We should prove that all the angles are 90'
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Parallelogram is a rectangle only if its angles are of 90 degree
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