In 3D computer graphics, a vertex is a point in 3D space with a particular location, usually given in terms of its x, y, and z coordinates. It is one of the fundamental structures in polygonal modelling: two vertices, taken together, define the endpoints of a line; three vertices define a planar triangle.
In graph theory, a graph describes a set of connections between objects. Each object is called a vertex or node. The connections themselves are called edges or arcs.
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