The eastern and western hemispheres.
100 degrees W is not part of the dividing line between hemispheres. The Prime Meridian (zero longitude) and the 180 degrees meridian are.
north and south hemispheres
The Prime Meridian and the meridian of 180° longitude, together, do.
Prime Meridian
-- the Prime Meridian -- 180 degrees (separates the eastern and western hemispheres opposite the Prime Meridian) -- 87.72111 degrees west (passes through my house)
0 degrees longitude
The Prime Meridian breaks the world into two hemispheres: east and west so the east of the Prime Meridian is any location with a positive longitude including most of Europe and all of the Middle East and Asia.
The Prime Meridian is 1/2 of the boundary between the eastern and western hemispheres.
The Prime Meridian, it is located at 0 degrees latitude.
0 degrees longitude
39 degrees north of the Equator, 77 degrees west of the prime meridian.
The zero degrees longitude line is called the Prime Meridian. When the Prime Meridian is combined with the meridian of 180 degrees longitude, the two meridians together form a circle that divides the Earth into the Eastern and Western Hemispheres.
The eastern and western hemispheres.
Everything from 1 degree 50 minutes east to 8 degrees 13 minutes west. But the Prime Meridian, at zero degrees, is defined as the location of the British Royal Observatory in Greenwich, England.
The greatest number of degrees anyone can be from the prime meridian is 180 degrees. This is because the prime meridian itself is located at 0 degrees longitude, and the maximum longitude value is 180 degrees both east and west. Therefore, any location can be a maximum of 180 degrees away from the prime meridian.
The Prime Meridian is east of France. The Prime Meridian is located in Greenwich, England. This is the location on earth where the longitude coordinate is 0 degrees.