o degrees
The Prime Meridian, located at 0 degrees longitude, separates the eastern hemisphere from the western hemisphere. It runs through Greenwich, London, and serves as the starting point for measuring longitude.
Prime Meridian
the prime meridian
No, the equator is a line of 0 degrees latitude that divides the Earth into the northern and southern hemispheres. The prime meridian, located at 0 degrees longitude, separates the eastern and western hemispheres.
The line that separates the eastern and western hemisphere is called the Prime Meridian. It runs from the North Pole to the South Pole, passing through Greenwich, London, marking 0 degrees longitude.
-- 20° north latitude is in the northern hemisphere, regardless of the longitude. -- 35° west longitude is in the western hemisphere, regardless of the latitude. -- I have no idea how the equator relates to the rest of this question.
The northern and southern Hemispheres each comprise 90 degrees of latitude. On your map or globe, you're free to draw as few or as many lines as you'd like to see in that range. There is no standard set of 'lines'.
The equator is the imaginary line that separates the world into the northern hemisphere and the southern hemisphere. It is located at 0 degrees latitude and runs east-west.
The Prime Meridian and the meridian of 180° longitude, together, do.
"20 degrees north" is completely in the northern hemisphere, regardless of longitude. "35 degrees west" is completely in the Western Hemisphere, regardless of latitude.
It is known as the Eastern Hemisphere, with lines of longitude easterly from the Prime Meridian (zero longitude) to the Datum Line of 180 degrees longitude. In the opposite direction from the Prime Meridian is the Western Hemisphere. To the north of the Equator is the Northern Hemisphere, and to the south of the Equator is the Southern Hemisphere.
The equator has 180 degrees in each hemisphere, dividing the Earth into the Northern and Southern Hemispheres.