80
It is latitude lines. this is all from my geography class. hehehe
!80 degrees east of Greenwich and then one crosses over to West Longitude
Shanghai, China is approximately 121 degrees east of the Prime Meridian, which is the internationally recognized marker of 0 degrees longitude.
The city of Dubai, located in the United Arab Emirates country in the Middle East. The coordinates are 25¡18'N, 55¡20'E, which puts it 55 degrees east of the Prime Meridian.
The prime meridian (designated as zero) runs from pole to pole, passing through the Greenwich Observatory, London, England. Lines of longitude to the east of the prime meridian are so many degrees east, and to the west of the Prime Meridian are so many degrees west.
Latitude
many african cities
many african cities
Botswana occupies the whole range of longitudes from 20° to 29.3° East of the Prime meridian.
180 degrees in each direction.
You would need to travel 360 degrees east to return to the prime meridian.
360 total, 180 degrees west of prime meridian, and 180 degrees east. There are 180 degrees of latitude, 90 degrees north of the equator, and 90 degrees south.