\begin{ccRefFunction}{coplanar}

\ccFunction{bool coplanar(const Point_3<Kernel> &p,
                               const Point_3<Kernel>&q,
                               const Point_3<Kernel>&r,
                               const Point_3<Kernel>&s);}
{returns \ccStyle{true}, if $p$, $q$, $r$, and $s$ are coplanar.}

\ccSeeAlso
\ccRefIdfierPage{CGAL::coplanar_orientation} \\
\ccRefIdfierPage{CGAL::coplanar_side_of_bounded_circle} \\

\end{ccRefFunction}