No lines are parallel to the Prime Meridian. All of the meridians of longitude are
farthest apart at the equator, and all converge at the north and south poles.
Parallel lines would be the same distance apart everywhere, and never meet.
The lines to the left of the prime meridian are negative.
Vertical lines parallel to the prime meridian are lines of longitude.
prime meridian
The longitude of a location is its angle east or west of the Prime Meridian.
The only lines that can run parallel to the Prime Meridian on any map are other meridians of longitude, and the only map on which they can be printed parallel to it is a Mercator Projection. They are not really parallel to the Prime Meridian.
The prime meridian is a line of longitude
The prime meridian.
Prime meridian
The imaginary line is called the Prime Meridian.
The Prime Meridian (long) The Equator (lat)
Longitude lines. They are also called meridians.
The prime meridian.