Dan je
i točke
redom na stranicama
takve da
i
. Ako
ima površinu
, kolika je površina četverokuta
?
is given with points
respectively on sides
such that
and
. If
has an area of
, what is the area of quadrilateral
?
[lang=hr]
Dan je $\triangle ABC$ i točke $D, E$ redom na stranicama $AB, AC$ takve da $BD=3AD$ i $CE=3AE$. Ako $\triangle ABC$ ima površinu $80$, kolika je površina četverokuta $DBCE$?
[/lang]
[lang=en]
$\triangle ABC$ is given with points $D, E$ respectively on sides $AB, AC$ such that $BD=3AD$ and $CE=3AE$. If $\triangle ABC$ has an area of $80$, what is the area of quadrilateral $DBCE$?
[/lang]
