Q. 195.0( 2 Votes )

ABCD is a paralle

Answer :

Given,


ABCD is a parallelogram



E is mid point of BC


DE & AB after producing meet at F


In ∆ECD & ∆BEF ,


BEF = CED [vertically opposite angles]


BE = EC


EDC = EFB [ alternate angles]


∆ECD ∆BEF


So, CD= BF


AB=CD


Thus, AF= AB+ BF


= AF = AB + CD


= AF = AB+AB


= AF = 2AB

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