Edges can have different meanings depending on the context. Here are some examples:

1. In geometry, an edge is a particular type of line segment joining two vertices in a polygon, polyhedron, or higher-dimensional polytope. In a polygon, an edge is a line segment on the boundary, and is often called a polygon side. In a polyhedron or more generally a polytope, an edge is a line segment where two faces (or polyhedron sides) meet. A segment joining two vertices while passing through the interior or exterior is not an edge but instead is called a diagonal).

2. In the context of hair, edges or baby hairs are shorter hairs situated at the hairline region at the perimeter of textured hair. They are most commonly found on Black and Brown women’s hair. For decades, women of color have turned them into works of art. The art of ‘laying’ baby hairs has become a ritualistic phenomenon that many Black and Brown women huddle close up to their mirrors to perfect as a finishing touch to their hair looks.

3. In mathematics, edges are the line segments that join one vertex to another and are also where the shapes faces meet. These can be used to describe 2D and 3D shapes. Students will use the knowledge of vertices, faces, and edges when looking at 2D shapes as well as 3D shapes. Knowing what edges are and identifying them on compound shapes is crucial for finding the perimeter and area of 2D compound shapes. It is an important foundation for later years when working with nets, surface area, and volume of complex figures as well as working with quadratic graphs and conic sections.

In summary, edges can refer to line segments joining two vertices in geometry, shorter hairs situated at the hairline region in hair, or line segments that join one vertex to another and are also where the shapes faces meet in mathematics.