The Prime Meridian is an imaginary semicircle that joins the Earth's north and south poles. As such, it's roughly 12,400 miles long, and extends through a range of 180 degrees of latitude. The longitude of every point on the Prime Meridian is zero.
Mexico City is 99.133333 degrees west of the Prime Meridian
The Prime Meridian is defined as the origin of longitude. The longitude of every point on it is zero.
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.
Shanghai, China is approximately 121 degrees east of the Prime Meridian, which is the internationally recognized marker of 0 degrees longitude.
!80 degrees east of Greenwich and then one crosses over to West Longitude
Botswana occupies the whole range of longitudes from 20° to 29.3° East of the Prime meridian.
The Greenwhich meridian also Prime Meridian is 0 degrees longitude and International Date Line roughly follows the 180° longitude or antimeridian. The antimeridian is the meridian which is 180° east or west of 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.
The Prime Meridian is located at 0 degrees longitude.
Starting from the Prime Meridian and going either east or west, you'll cover 360 degrees of longitude before you find yourself back at the Prime Meridian again. Half-way around a sphere corresponds to 180 degrees. If you and your friend both start out from the Prime Meridian, and one of you travels east around the globe and the other travels west around the globe, you'll eventually meet each other. If you both travel exactly the same distance, then you each cover 180 degrees of longitude, and you meet exactly on the other side opposite the Prime Meridian, in the middle of the Pacific Ocean, at 180 degrees longitude, both east and west.
Each 'side' of the Prime Meridian comprises 180 degrees, for a total of 360 degrees all the way around the Earth just as you would expect. You're free to draw as few or as many 'lines' in any of those intervals as you feel are necessary.
Morocco