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In the figure \(\triangle ABC\) has sides \(AB = 7.5 cm\), \(AC = 6.5 cm\) and \(BC = 7 cm\). On base \(BC\) a parallelogram \(DBCE\) of same area as that of \(\triangle ABC\) is constructed. Find the height \(DF\) of the parallelogram
 
YCIND_240326_6123_Heron_11.png
 
Ans: \(cm\)