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Find the value of \(AC\) in the following pair of triangles where \(DF =\) 43 \(cm\), \(DE =\) 42 \(cm\) and \(AB =\) 84 \(cm\).
 
YCIND13052022_3741_TN_Class8_Geometry_28.svg
 
The value of \(AC\) is  \(cm\).