The diagonals of parallelogram ……
are congruent
are perpendicular
bisect each other
rectangle
Diagonals of a parallelogram is bisect each other.
If the diagonals of a parallelogram are of equal lengths, the parallelogram is arectangle. Prove it.
Prove logically the diagonals of a parallelogram bisect each other. Show conversely that a quadrilateral in which diagonals bisect each other is a parallelogram.