Q : 3 In Fig. , ABCD, DCFE and ABFE are parallelograms. Show that .
ABCD is a parallelogram. Therefore, AB = CD & AD = BC & AB || CD .......(i)
Now, ADE and BCF are on the same base AD = BC and between same parallels AB and EF.
Therefore, ar (ADE) = ar(BCF)
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