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## Kernel::AreParallel_3

A model for this must provide:

bool |
fo.operator() ( | Kernel::Line_3 l1, Kernel::Line_3 l2)
|  | returns true, if l1 and l2 are parallel or if one of those (or both) is degenerate.
bool |
fo.operator() ( | Kernel::Plane_3 h1, Kernel::Plane_3 h2)
|  | returns true, if h1 and h2 are parallel or if one of those (or both) is degenerate.
bool | fo.operator() ( Kernel::Ray_3 r1, Kernel::Ray_3 r2)
|  | returns true, if r1 and r2 are parallel or if one of those (or both) is degenerate.
bool |
fo.operator() ( | Kernel::Segment_3 s1, Kernel::Segment_3 s2)
|  | returns true, if s1 and s2 are parallel or if one of those (or both) is degenerate.

### Refines

AdaptableFunctor (with two arguments)

### See Also

CGAL::parallel

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The CGAL Project . Tue, December 21, 2004 .