## Vertex count

*Full article: Vertex*

The **vertex count** of a shape is the total number of vertices (points that are part of a larger shape) it has. This can therefore be considered the shape's total extent in zero-dimensional space.

Vertex count is unitless.

## Edge length

The **edge length** of a shape is the total length of all of its edges. This can therefore be considered the shape's total extent in one-dimensional space. The edge length of a polytelon is called its **length**. The edge length of a polygon is called its **perimeter**.

Edge length in physics is measured in metres.

## Surface area

The **surface area** of a shape is the total area of all its faces. This can therefore be considered the shape's total extent in two-dimensional space. The surface area of a polygon is simply called its **area**.

Surface area in physics is measured in meters squared.

## Surcell volume

The **surcell volume** of a shape is the total volume of all its cells. This can therefore be considered the shape's total extent in three-dimensional space. The surcell volume of a polyhedron is simply called its **volume**.

Surface area in physics is measured in metres cubed.

## Surteron bulk

The **surteron bulk** of a shape is the total bulk of all its tera. This can therefore be considered the shape's total extent in four-dimensional space. The surteron bulk of a polychoron is simply called its **bulk**.

Surteron bulk in theoretical physics is measured in metres to the fourth.