# Edge

3D Geometry

## Definition

An edge in three-dimensional geometry is the line segment where two faces of a 3D shape meet.

## Description

In the study of three-dimensional geometry, an edge is a fundamental concept that helps define the structure and properties of 3D shapes. Each edge is formed by the intersection of two faces, and it is a critical component in determining the overall shape and form of a 3D object. For instance, a cube has 12 edges, each formed by the meeting of two square faces.

Understanding edges is crucial for several reasons. First, they help in calculating the surface area and volume of 3D shapes, as the length of the edges can be used in various geometric formulas. Second, edges play a significant role in defining the vertices of a shape, which are the points where multiple edges meet. For example, a vertex in a cube is the point where three edges intersect.

Moreover, edges are essential in the practical application of 3D geometry in fields such as architecture, engineering, and computer graphics. In these disciplines, precise measurements of edges are necessary for creating accurate models and structures. For example, in computer graphics, the edges of polygons are used to create wireframe models, which serve as the basis for rendering 3D objects.

In summary, edges are indispensable in the realm of 3D geometry, serving as the building blocks for understanding and manipulating three-dimensional shapes. Their significance extends beyond theoretical mathematics to practical applications in various scientific and engineering fields.

For a complete collection of terms related to 3D geometry click on this link: 3D Collection.

Common Core Standards CCSS.MATH.CONTENT.5.MD.C.3 4 - 6 Geometry     • 3D Geometry         • 3-Dimensional Figures 2013 three-dimensional geometry, 3d Geometry, defnitions, glossary term