Q:
# How Many Edges Does a Cuboid Have?

**A cuboid has 12 edges.** A cuboid is a box-like shaped polyhedron that has six rectangular plane faces. A cuboid also has six faces and eight vertices.

Credit:
Ruth Hartnup
CC-BY-2.0

Knowing these latter two facts about a cuboid, the number of edges can be calculated with Euler’s polyhedral formula. This formula states that the number of faces (F) plus the number of vertices (V) minus the number of edges (E) equals 2, or F + V - E = 2.

By substituting 6 for V and 8 for V in this equation, it becomes 6 + 8 - E = 2, or 14 - E = 2. From this equation, it is simple to see that E equals 12.

Learn more about Shapes-
Q:
## What Is a Three-Dimensional Rectangle Called?

A: A three-dimensional rectangle is called a cuboid. A cuboid is defined as a closed box that is composed of six rectangular faces joined at right angles. The... Full Answer >Filed Under: -
Q:
## What Is a Polygon With Six Sides and Six Angles ?

A: Hexagons are polygons with six sides (or edges) and six angles (or vertices). They are classified as regular or irregular, as well as convex or concave. Full Answer >Filed Under: -
Q:
## How Do You Make a Dodecahedron?

A: Draw the design of 12 pentagrams from cardstock, cut the design out, fold along all the lines, then glue or tape the edges together where they meet. Full Answer >Filed Under: -
Q:
## How Many Vertices Does a Sphere Have?

A: A vertex is a corner on a polygon, polytope or polyhedron, and when faces, facets or edges of an object come together, a vertex forms; however, because a s... Full Answer >Filed Under: