Question

prove that the diagonals of a parllelogram bisect each other
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Answer 1

Solution___

Expert Answer:

ABCD is a parallelogram, diagonals AC and BD intersect at O.

In triangles AOD and COB,

DAO = BCO (alternate interior angles)

DAO = BCO (alternate interior angles)AD = CB.

DAO = BCO (alternate interior angles)AD = CB.ADO = CBO (alternate interior angles)

DAO = BCO (alternate interior angles)AD = CB.ADO = CBO (alternate interior angles)AOD COB (ASA)

Hence, AO = CO and OD = OB (c.p.c.t)

Thus, the diagonals of a parallelogram bisect each other.

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