CGAL 5.0.2 - 2D and 3D Linear Geometry Kernel
Circle_2<Kernel>_grp
Circle_3<Kernel>_grp
Sphere_3<Kernel>_grp

## Functions

template<typename Kernel >
FT CGAL::squared_radius (const CGAL::Point_2< Kernel > &p, const CGAL::Point_2< Kernel > &q, const CGAL::Point_2< Kernel > &r)
compute the squared radius of the circle passing through the points p, q, and r. More...

template<typename Kernel >
FT CGAL::squared_radius (const CGAL::Point_2< Kernel > &p, const CGAL::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.

template<typename Kernel >
FT CGAL::squared_radius (const CGAL::Point_2< Kernel > &p)
compute the squared radius of the smallest circle passing through p, i.e. $$0$$.

template<typename Kernel >
FT CGAL::squared_radius (const CGAL::Point_3< Kernel > &p, const CGAL::Point_3< Kernel > &q, const CGAL::Point_3< Kernel > &r, const CGAL::Point_3< Kernel > &s)
compute the squared radius of the sphere passing through the points p, q, r and s. More...

template<typename Kernel >
FT CGAL::squared_radius (const CGAL::Point_3< Kernel > &p, const CGAL::Point_3< Kernel > &q, const CGAL::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.

template<typename Kernel >
FT CGAL::squared_radius (const CGAL::Point_3< Kernel > &p, const CGAL::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.

template<typename Kernel >
FT CGAL::squared_radius (const CGAL::Point_3< Kernel > &p)
compute the squared radius of the smallest circle passing through p, i.e. $$0$$.

## Function Documentation

template<typename Kernel >
 FT CGAL::squared_radius ( const CGAL::Point_2< Kernel > & p, const CGAL::Point_2< Kernel > & q, const CGAL::Point_2< Kernel > & r )

#include <CGAL/Kernel/global_functions.h>

compute the squared radius of the circle passing through the points p, q, and r.

Precondition
p, q, and r are not collinear.

#include <CGAL/Kernel/global_functions.h>
compute the squared radius of the sphere passing through the points p, q, r and s.
p, q, r and s are not coplanar.