A **vertex** is a corner. More than one vertex are called **vertices**. A vertex is a point where two or more lines, curves, rays, or sides meet, and is often represented by letters such as , , and .^{[1]}

For example, the vertex of an angle is the point where the two edges of the angle intersect, and a vertex of a cube is simply one of its corners—of which there are eight.^{[2]}

The concept of vertex applies to both two-dimensional and three-dimensional geometrical objects. For example, a tetrahedron has four vertices, and a pentagon has five vertices.^{[3]}

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