Definition:Vertex

Disambiguation

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Vertex may refer to:

• Graph Theory:
  • Vertex of Graph: The vertices of a graph are the points, which may or may not be joined by edges.

• Geometry and Solid Geometry:
  • Vertex: A point at which $2$ or more line segments meet on the boundary of a geometric figure:
    • Vertex of Polygon: The corners of a polygon are known as its vertices.
    • Vertex of Polyhedron: The corners of a polyhedron are known as its vertices.
    • Vertex of Angle: The point at which the lines containing an angle meet is known as its vertex.
    • Vertex of Solid Angle: The common vertex of the angles containing a solid angle is known as the vertex of that solid angle.
  • Vertex of Cone: Another term for apex.

• Conic Sections:
  • Vertex of Conic Section:
    • Vertex of Ellipse: The endpoints of the major axis of an ellipse are its vertices.
    • Vertex of Parabola: The point at which a parabola cuts its axis.
    • Vertex of Hyperbola: The points where a hyperbola intersects its major axis are its vertices.

Linguistic Note

The plural of vertex is vertices.

The word vertex is Latin for peak, from which the irregular plural form.

Also see

• Definition:Point
• Definition:Edge
• Definition:Face