The Prime Meridian is 1/2 of the boundary between the eastern and western hemispheres.
The Prime Meridian is part of the boundary between the eastern and western hemispheres. The International Date Line is the rest of the boundary.
The prime meridian at longitude 0° marks the eastern boundary of the Western Hemisphere The corresponding anti-meridian at Longitude 180° marks the western boundary of the Western Hemisphere. (In practical terms you could also consider the international date line to be the boundary - just not the official boundary.)
The prime meridian divides the earth into eastern and western hemispheres, just as the equator divides it into northern and southern hemispheres. Australia is to the east of the prime meridian and is considered to be in the eastern hemisphere.
The International Date Line and the Prime Meridian both separate the eastern from the western hemisphere.
The eastern hemiphere is the half of the globe to the "right" of the Prime Meridian as far as the International Date Line. Africa, Europe, Asia, and Australia are considered to be in the eastern hemisphere, although a large region in western Africa is to the west of the meridian.
The eastern and western hemispheres are divided by the prime meridian.
Half of the Prime Meridian is in the northern hemisphere, and half of it is in the southern one. Also, it is half of the boundary line between the eastern and western hemispheres, so it's in either both or neither of those.
The full circle formed by the Prime Meridian and the meridian of 180° longitude separates the eastern and western hemispheres.
The full circle formed by the Prime Meridian and the meridian of 180° longitude separates the eastern and western hemispheres.
The full circle formed by the Prime Meridian and the meridian of 180° longitude separates the eastern and western hemispheres.
Half of the Prime Meridian is in the northern hemisphere, and half of it is in the southern one. Also, it is half of the boundary line between the eastern and western hemispheres, so it's in either both or neither of those.