Definition of transversal in geometry
A transversal is a line that intersects two or more other lines on a plane at two or more distinct points.
In the figure above, the red line is a transversal.
- A transversal does not have to cross parallel lines.
- A line that crosses only one line is not a transversal.
- It is not proper to say "transversal line" since the word transversal already means line.
- In practice, a transversal usually cuts parallel lines.