Category:Surfaces

This category contains results about Surfaces in the context of Geometry.
Definitions specific to this category can be found in Definitions/Surfaces.

In the words of Euclid:

A surface is that which has length and breadth only.

(The Elements: Book $\text{I}$: Definition $5$)

and:

An extremity of a solid is a surface.

(The Elements: Book $\text{XI}$: Definition $2$)