Meridians are lines on a sphere (or other geometric solid) all of which go through the poles.
Degrees are a unit of measurement of angles and temperature and concentration, and some other things. As a unit for measuring angles, meridians are measured in degrees. There are 360 degrees in a complete circle.
Two meridians can form a great circle when they are 180 degrees apart, as they represent opposite points on the Earth's surface. For example, the Prime Meridian at 0 degrees and the Antimeridian at 180 degrees are such meridians. Any two meridians that are 180 degrees apart will create a great circle, which is the largest circle that can be drawn on the surface of a sphere.
The meridians meet at 90 degrees South latitude -- the South Pole.
Meridians are lines of longitude that run north-south and connect the North Pole to the South Pole. There are 360 meridians that divide the Earth into 360 degrees of longitude, with the prime meridian at 0 degrees.
degrees
360
Degrees of Longitude or Meridians.
The Prime Meridian is numbered zero degrees. Meridians, or lines of longitude, are numbered with increasing numbers of degrees both east and west of the Prime Meridian. On the opposite side of the world from the Prime Meridian is 90 degrees, which is also the International Date Line.
Prime Meridians.
90 degrees
90 degrees
The Prime or Greenwich meridian. 0 degrees longitude
There are 360 meridians in the world, as they are lines of longitude that divide the Earth into 360 degrees from the Prime Meridian at Greenwich, England.