Definition:Vertex


 * 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.


 * Conic Sections:
 * 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.

Also see

 * Definition:Point
 * Definition:Edge
 * Definition:Face