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In the given figure, $DE \| BC$. Find AD.
"
Given:
$DE \| BC$
To do:
We have to find $AD$.
Solution:
In $\triangle ABC$, by B.P.T.,
$\frac{AD}{DB}=\frac{AE}{EC}$
$\frac{AD}{7.2}=\frac{1.8}{5.4}$
$AD=\frac{1\times7.2}{3}$
$AD=2.4\ cm$
Therefore, $AD=2.4\ cm$.
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