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## CGAL::collinear

bool |
collinear ( | Point_2<Kernel> p, Point_2<Kernel> q, Point_2<Kernel> r)
|  | returns true, iff p, q, and r are collinear.
bool |
collinear ( | Point_3<Kernel> p, Point_3<Kernel> q, Point_3<Kernel> r)
|  | returns true, iff p, q, and r are collinear.

### See Also

CGAL::left_turn
CGAL::orientation
CGAL::right_turn

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The CGAL Project . Tue, December 21, 2004 .