# Definition:Polygon/Adjacent

< Definition:Polygon(Redirected from Definition:Adjacent Sides)

*This page is about adjacent elements in a polygon. For other uses, see Definition:Adjacent.*

## Definition

Each vertex of a polygon is formed by the intersection of two sides.

The two sides that form a particular vertex are referred to as the **adjacents** of that vertex, or described as **adjacent to** that vertex.

Similarly, each side of a polygon intersects two other sides, and so is terminated at either endpoint by two vertices.

The two vertices that terminate a particular side are referred to as the **adjacents** of that side, or described as **adjacent to** that side.

Similarly, those two vertices are described as **adjacent to each other**.

Finally, two sides of a polygon that meet at the same vertex are **adjacent** to each other.