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Question

In a parallelogram ABCD, the bisectors of A also bisect BC at x, find AB : AD.

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Solution

In || gm ABCD,

Bisectors of A meets BC at X

and BX = XC

Draw XY || gm AB meeting AD at Y

diagonal AX bisects A

ABXY is a rhombus

AB=BX=AY

Now ABAD=ABBC=AB2BX=BX2BX=12AB:AD=1:2


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