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, can be used to define the endpoints of a line; three vertices can be used to define a planar triangle.

In graph theory, a *graph* describes a set of connections between nodes. Each node or **vertex** can map to an object. The connections between the nodes are called *edges* or *arcs*.

See also parabola.