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## CGAL::squared_radius

FT |
squared_radius ( | Point_2<Kernel> p, Point_2<Kernel> q, Point_2<Kernel> r)
|  | compute the squared radius of the circle passing through the points p, q, and r. Precondition: p, q, and r are not collinear.
FT | squared_radius ( Point_2<Kernel> p, 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.
FT |
squared_radius ( | Point_3<Kernel> p, Point_3<Kernel> q, Point_3<Kernel> r, Point_3<Kernel> s)
|  | compute the squared radius of the sphere passing through the points p, q, r and s. Precondition: p, q, r and s are not coplanar.
FT |
squared_radius ( | Point_3<Kernel> p, Point_3<Kernel> q, 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.
FT | squared_radius ( Point_3<Kernel> p, 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.

### See Also

CGAL::Circle_2<Kernel>
CGAL::Sphere_3<Kernel>

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The CGAL Project . Tue, December 21, 2004 .