tr ADC dr isoscel AD=DC
in tr ADC tg B=AD/BD, AD=7 BD=DC
BD+DC=[tex]16 \sqrt{2} [/tex]
BD+ 7BD=8BD=[tex]16 \sqrt{2} [/tex]
BD=[tex]2 \sqrt{2} [/tex]
DC=AD=[tex]14 \sqrt{2} [/tex]
AC=AD[tex] \sqrt{2} [/tex]=28
AB=20(cu Pit. in tr ABD)
A=BC.AD/2=16[tex] \sqrt{2} .14 \sqrt{2}/2=224[/tex]
BE.AC=BC.AD
BE=448/28=16