In \(\Delta ABC\), \(D\) and \(E\) are points on the sides \(AB\) and \(AC\) respectively. Each of the following cases show that \(DE || BC\).
 
\(AB = 32 \ cm\), \(AD = 20 \ cm\), \(AC = 28.8 \ cm\) and \(AE = 18 \ cm\)
 
ABAD=ii
 
ACAE=ii
 
ABAD  ACAE
 
By  theorem, \(DE || BC\).
 
[Note: Enter the simplest ratio.]