ABCD dortgen
B,C,E dogrusal
[CD] aciortay
$[CD]\bot[AD]$
|AF|=|FB|
|BC|=5cm
|AC|=7cm
|FD|=?
B ve D yi birlestirip benzerlik yapmaya calistim.
$\dfrac{a}{2a}$=$\dfrac{|FD|}{14}$
|FD|=6cm