CGAL 5.6.3 - 2D and 3D Linear Geometry Kernel

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Kernel::ComputeApproximateSquaredLength_3 Concept Reference
2D and 3D Linear Geometry Kernel Reference » Concepts » Kernel Function Object Concepts

## Definition

Refines
  `AdaptableUnaryFunction`

See also
  `CGAL::Circle_3<Kernel>`

## Operations
A model of this concept must provide:
double | operator() (const Kernel::Circle_3 &c)
| returns an approximation of the squared length (i.e. perimeter) of `c`.