| HalfLine |  | 
| 1 (Type/Class) | Data.Geometry.HalfLine | 
| 2 (Data Constructor) | Data.Geometry.HalfLine | 
| halfLineDirection | Data.Geometry.HalfLine | 
| halfLineToSubLine | Data.Geometry.HalfLine | 
| HalfPlane | Data.Geometry.HalfSpace | 
| HalfSpace |  | 
| 1 (Type/Class) | Data.Geometry.HalfSpace | 
| 2 (Data Constructor) | Data.Geometry.HalfSpace | 
| handle | Algorithms.Geometry.LineSegmentIntersection.BentleyOttmann | 
| handlePoint | Algorithms.Geometry.LineSegmentIntersection.Naive | 
| HasBoundingLines | Data.Geometry.Slab | 
| HasDataOf | Data.PlaneGraph.Core, Data.PlaneGraph, Data.Geometry.PlanarSubdivision.Basic, Data.Geometry.PlanarSubdivision | 
| HasDeterminant | Data.Geometry.Matrix | 
| HasEnd | Data.Geometry.Interval, Data.Geometry.LineSegment, Data.Geometry | 
| hasInteriorIntersections | Algorithms.Geometry.LineSegmentIntersection | 
| hasLevel | Algorithms.Geometry.WellSeparatedPairDecomposition.WSPD | 
| hasNoPertubation | Algorithms.Geometry.SoS.Symbolic | 
| hasSelfIntersections | Algorithms.Geometry.LineSegmentIntersection | 
| HasStart | Data.Geometry.Interval, Data.Geometry.LineSegment, Data.Geometry | 
| HasSupportingLine | Data.Geometry.Line.Internal, Data.Geometry.Line, Data.Geometry | 
| HasSupportingPlane | Data.Geometry.HyperPlane | 
| head | Data.Geometry.Vector.VectorFamily, Data.Geometry.Vector, Data.Geometry | 
| headOf |  | 
| 1 (Function) | Data.PlaneGraph.Core, Data.PlaneGraph | 
| 2 (Function) | Data.Geometry.PlanarSubdivision.Basic, Data.Geometry.PlanarSubdivision | 
| height |  | 
| 1 (Function) | Data.Geometry.Box.Internal, Data.Geometry.Box | 
| 2 (Function) | Data.Geometry.QuadTree.Tree | 
| holeList | Data.Geometry.Polygon, Data.Geometry | 
| holes | Data.Geometry.PlanarSubdivision.Raw, Data.Geometry.PlanarSubdivision.Basic, Data.Geometry.PlanarSubdivision | 
| holesOf | Data.Geometry.PlanarSubdivision.Basic, Data.Geometry.PlanarSubdivision | 
| Horizontal | Data.Geometry.Slab | 
| horizontalLine | Data.Geometry.Line.Internal, Data.Geometry.Line, Data.Geometry | 
| horizontalSlab | Data.Geometry.Slab | 
| HyperPlane |  | 
| 1 (Type/Class) | Data.Geometry.HyperPlane | 
| 2 (Data Constructor) | Data.Geometry.HyperPlane |