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# If B is the mid point of AC and C is the mid point of BD where A B C D lie on a straight line say why AB CD

6.  If B is the mid point of AC and C is the mid point of BD, where A,B,C,D lie on a straight line, say why AB = CD?

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To Prove$:AB=CD$

B is the mid point of AC

$\therefore \ AB=BC$            $(i)$

C is the mid point of BD

$\therefore \ BC=CD$            $(ii)$

From (i) and (ii) we can conclude $AB=CD$

Hence proved.

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