Line
A continuous arrangement of an infinite number of points aligned on a plane.
Notation
Although there is no universally recognized notation for a line, it is generally denoted by a lowercase letter or by two of its points (expressed in capital letters). Therefore, the line that passes through points A and B is written as [latex]\overline{AB}[/latex]. It is also represented by the letter l.Properties
- Invariant line A line is invariant if it remains unchanged under a geometric transformation.
- Boundary line A line that divides a geometric plane or a Cartesian plane into two half plane.
- Oblique line A line that crosses another line without being perpendicular to the other line.
- Directed line Line on which there is a positive and negative direction.
- Special Line (or segment) in a triangle Name given to each angle bisector of a triangle, the perpendicular bisector of each of its sides, the median to each of its sides or each of its heights.