transversal
A transversal is a line that crosses two or more other lines in the plane at different points.
A perpendicular line is a type of intersecting line that crosses the other line at a right angle.
Such a line, if it is straight, is a diameter.
A line that crosses two or more lines is called a transversal. In geometry, a transversal intersects two or more other lines at different points, creating various angles. The relationships between the angles formed by the transversal and the other lines can be analyzed to explore properties such as parallelism and angle congruence.
Perpendicular lines are where a line crosses another line and forms 4 right angles on all 4 sides but a intersecting line only crosses another line
A line of interception.
Transversal lines are made when one line crosses two parallel lines.
That's a "transversal".
There are three lines in the figure described. Two of the lines never meet, these are the parallel lines. The third line crosses the other lines, it is the "transversal" line. If the parallel lines are really line SEGMENTS then each can be bisected (cut into two equal lengths) This is what your description states.
Restate the question: What is the name for a line that crosses two parallel lines? Transversal
No "named" line of longitude crosses Australia. The Tropic of Capricorn (latitude) crosses Australia.
Scab