That's like asking "How many marks are there on a ruler ?"
There are 360 degrees of longitude around the Earth. Some maps and globes
have a line every 10 degrees, some have a line every 15 degrees, some have
a line every 30 degrees, and some don't have any lines printed on them at all.
The mapping software that I use will print 1,800 lines in every degree, if I feel
that I need them for some reason. And no matter how many lines there are on
your map, there are always longitudes between the lines, just like there are
lengths between the marks on the ruler.
There is no official, standard set of 'lines' that everybody has to use. You can have
as few or as many lines on your map as you feel comfortable with.
Latitude lines are parallel but not longitude lines.
The horizontal lines are called latitudes and the vertical lines are called longitudes.
There are 360 longitudes
The horizontal lines are called latitudes and the vertical lines are called longitudes.
longitudes or meridians
There can be infinitely many lines: think of the longitudes through he North and South poles. However, there can be only one straight line.
Many imaginary lines run through India. Latitudes and longitudes for instance.
meridians or lines of longitude
Longitudes are lines that run north to south on a globe. At the poles, longitudes converge and meet because all lines of longitude, or meridians, come together at a single point. This means that at the poles, there is no east or west direction left to differentiate between, so the longitudes effectively merge together.
All longitudes converge at the north and south poles.
They are lines of longitude and latitude, often just longitudes and latitudes.
Longitudinal or longitude lines are the imaginary lines that are perpendicular to the equator. Latitudinal or latitude lines are parallel to the equator.