Geometric graphs

Relative neighborhood graph

In computational geometry, the relative neighborhood graph (RNG) is an undirected graph defined on a set of points in the Euclidean plane by connecting two points and by an edge whenever there does not exist a third point that is closer to both and than they are to each other. This graph was proposed by Godfried Toussaint in 1980 as a way of defining a structure from a set of points that would match human perceptions of the shape of the set. (Wikipedia).

Relative neighborhood graph
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What are examples of adjacent angles

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What are examples of Vertical angles

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What are supplementary angles

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Lens (geometry) | Unit square | Delaunay triangulation | Urquhart graph | Computational geometry | Godfried Toussaint | Glossary of graph theory | Euclidean plane | Beta skeleton | Euclidean minimum spanning tree