# Projective Plane

The projective plane is the set of lines in the Euclidean plane that pass through the origin. It can also be viewed as the Euclidean plane together with a line at infinity.

Projective plane is a college-level concept that would be first encountered in a topology course.

### Prerequisites

Line: | A line is the infinite extension in both directions of a line segment, giving the path of shortest distance between two points in Euclidean space. |

Origin: | The origin is the point with all-zero coordinates in Cartesian coordinates, or the central point in polar coordinates. |