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area(ABEF) =area(ABCD) according to the parallel ||gm which lies on the same base
area(ABD) =1/2 area ( ABEF) =area(BEF)
area of ABD =1/2×90 =45=area of BEF
So, area of ABD=area of BEF=45cm
area(ABD) =1/2 area ( ABEF) =area(BEF)
area of ABD =1/2×90 =45=area of BEF
So, area of ABD=area of BEF=45cm
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