Category:Geometric Figures

This category contains results about Geometric Figures.
Definitions specific to this category can be found in Definitions/Geometric Figures.

A geometric figure is intuitively defined as a set of points and lines in space.

In the words of Euclid:

A figure is that which is contained by any boundary or boundaries.

(The Elements: Book $\text{I}$: Definition $14$)

The boundary may or may not be included in a particular figure. If this is important (and in the study of topology it usually is), then whether it is included or not needs to be specified.