# Definition:Adjacent

Jump to navigation
Jump to search

## Disambiguation

This page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.

**Adjacent** may refer to:

- Adjacent (Graph Theory):
- Two vertices are said to be
**adjacent**if and only if there exists an edge to which they are both incident. - Two edges are said to be
**adjacent**if and only if there exists an vertex to which they are both incident. - Two faces of a planar graph are said to be
**adjacent**or**neighboring**if and only if there exists an edge to which they are both incident.

- Two vertices are said to be

- Adjacent (Geometry):
- Two angles are adjacent if and only if they share a line. Similarly:
- The two sides of a polygon that form a particular vertex are
**adjacent to**that vertex. - The two vertices of a polygon that terminate a particular side are
**adjacent to**that side. - Two sides of a polygon that meet at the same vertex are
**adjacent**to each other. - Two vertices of a polygon that terminate the same side are
**adjacent**to each other.

- Adjacent (in a Triangle): The two sides of a triangle that form a particular vertex are
**adjacent to**that vertex. Usually used in the context of right triangles:- Adjacent (in the context of Trigonometry): The
**adjacent side**of a given right triangle $\triangle ABC$ with respect to one of the non-right angles $\angle A$ is the side of the right triangle adjacent to $A$ which is not the hypotenuse.

- Adjacent (in the context of Trigonometry): The