Because the Earth is sperical is shape.
Latitude is measured on a map or globe in degrees, with the equator being 0 degrees and the North and South Poles being 90 degrees north and south, respectively.
Distance from the Equator is measured using lines of latitude. The Equator is designated as 0 degrees latitude, and distances are measured in degrees, minutes, and seconds north or south of the Equator.
The radius of a sphere would be measured in some unit of length, depending upon how large the sphere is. If the globe is a planet, I would use kilometers.
The measurement used to determine distances in degrees from the prime meridian is called longitude. Longitude lines run vertically from the North Pole to the South Pole and are measured in degrees, with the prime meridian at 0 degrees. Distances east and west of the prime meridian are expressed in degrees up to 180 degrees in either direction.
All the way around anything that's measured in angles is typically 360 degrees, and the earth is no exception.
The angular distance north or south of the earths equator, measured in degrees, along a meridian, as on the map or globe.
they are measured in AU
The distances are measured from the tip of home plate to the bottom of the fence.
Usually such distances are measured either in light-years, or in parsecs.
Long distances are measured in AU in Eve Online. For short distances, it is measured in KM.
The 24 longitudinal lines on the globe are called meridians. They run from the North Pole to the South Pole and are used to measure distances east and west of the Prime Meridian, which passes through Greenwich, England. Each meridian is spaced 15 degrees apart, totaling 360 degrees around the globe.
The equator is located at 0 degrees latitude making it a parallel. Distances north and south of the equator are measured from this point.