\begin{ccRefFunction}{squared_radius}

\ccFunction{FT
squared_radius( const Point_2<Kernel>& p,
                const Point_2<Kernel>& q,
                const Point_2<Kernel>& r);}
 {compute the squared radius of the circle passing through the points
 $p$, $q$, and $r$.  \ccPrecond $p$, $q$, and $r$ are not collinear.}

\ccFunction{FT
squared_radius( const Point_2<Kernel>& p,
                const Point_2<Kernel>& q);}
{compute the squared radius of the smallest circle passing through $p$,
and $q$, i.e. one fourth of the squared distance between $p$ and $q$.}

\ccFunction{FT
squared_radius( const Point_2<Kernel>& p);}
{compute the squared radius of the smallest circle passing through $p$, 
i.e. $0$.}

\ccFunction{FT
squared_radius( const Point_3<Kernel>& p,
                const Point_3<Kernel>& q,
                const Point_3<Kernel>& r,
                const Point_3<Kernel>& s);}
 {compute the squared radius of the sphere passing through the points $p$,
 $q$, $r$ and $s$.  \ccPrecond $p$, $q$, $r$ and $s$ are not coplanar.}

\ccFunction{FT
squared_radius( const Point_3<Kernel>& p,
                const Point_3<Kernel>& q,
                const Point_3<Kernel>& r);}
 {compute the squared radius of the sphere passing through the points $p$,
 $q$, and $r$ and whose center is in the same plane as those three points.}

\ccFunction{FT
squared_radius( const Point_3<Kernel>& p,
                const Point_3<Kernel>& q);}
{compute the squared radius of the smallest circle passing through $p$,
and $q$, i.e. one fourth of the squared distance between $p$ and $q$.}

\ccFunction{FT
squared_radius( const Point_3<Kernel>& p);}
{compute the squared radius of the smallest circle passing through $p$, 
i.e. $0$.}

\ccSeeAlso
\ccRefIdfierPage{CGAL::Circle_2<Kernel>} \\
\ccRefIdfierPage{CGAL::Circle_3<Kernel>} \\
\ccRefIdfierPage{CGAL::Sphere_3<Kernel>} \\

\end{ccRefFunction}