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Question

Prove that diagonals of a parallelogram bisect each other.


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Solution

Consider a parallelogram with sides ABCD in which diagonals AC and BD bisect each other.

We have to Prove that OA=OC and OB=OD.

AB||CD

DAC=BCA………(alternate angles)

ADB=CBD………(alternate angles)

AB=CD…………. (opposite sides of parallelogram)

CODAOB………… (A.S.A. rule)

OA=OC and OB=OD

Therefore, diagonals of a parallelogram bisect each other.


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