Category:Definitions/Rectilineal Figures

This category contains definitions related to Rectilineal Figures.
Related results can be found in Category:Rectilineal Figures.

In the words of Euclid:

Rectilineal figures are those which are contained by straight lines, trilateral figures being those contained by three, quadrilateral those contained by four, and multi-lateral those contained by more than four straight lines.

(The Elements: Book $\text{I}$: Definition $19$)