The latitude of the north pole is 90° north. (Similarly, the latitude of the south pole
is 90° south.)
Looking at a globe, you notice that the parallels of latitude are all circles that are
parallel to the equator and to each other, and that the closer a parallel is to the
north or south pole, the smaller it is. Right exactly atthe pole, it's a circle with
zero size, which is just a point. So you might say that the pole itself is the 'line'
of 90° latitude.
All the lines of longitude intersect at the earths poles and their point of intersection is the position of the pole.
90 degrees north latitude is the north pole. The equator is zero latitude.
The 0 line of latitude is called the Equator and is located equidistant from the North Pole and the South Pole.
The North pole is defined at geodetic latitude 90
The most northern 'line' of latitude is really a point. 90 degrees latitude north is the north pole.
If you are moving away from the North Pole and crossing lines of Latitude, you are heading for the Equator, and ultimately the South Pole.
The farthest north latitude is 90° North. It is a single point, called the 'north pole'.
The farthest-north latitude is 90 degrees north, located at the north pole. The farthest-south latitude is 90 degrees south, located at the south pole. Each of these locations is a single point, not a 'line'.
The equator (zero degrees latitude) is a line halfway between the North Pole (90 degrees N latitude) and the South Pole (90 degrees S latitude). Any point on the equator is equidistant from the poles.
The Equator is the line of 0 degrees latitude. The latitudes of the North Pole is 90 degrees north, and the South Pole is 90 degrees south.
90 degrees north latitude
The latitude of any point on Earth that's halfway between the equator and the north pole is 45° North. On any randomly chosen map or globe, there may or may not be a line printed to show that latitude.