The eastern and western ones are.
The Prime Meridian is 1/2 of the boundary between the eastern and western hemispheres.
Earth is divided into the Northern and Southern hemispheres by the equator, and the Eastern and Western hemispheres by the Prime Meridian.
The hemispheres of Earth are divided by the Equator into Northern and Southern Hemispheres, and by the Prime Meridian and the 180th meridian into Eastern and Western Hemispheres.
The Equator devides the earth in to North and South hemispheres
The Earth is divided into four hemispheres: Northern Hemisphere, Southern Hemisphere, Eastern Hemisphere, and Western Hemisphere. These divisions are based on the equator and the prime meridian, with the equator dividing the Northern and Southern Hemispheres, and the prime meridian dividing the Eastern and Western Hemispheres.
Eastern and Western
The Prime Meridian and its opposite the 180th meridian (at 180° longitude), which the International Date Line.
The eastern and western hemispheres are divided by the prime meridian.
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 eastern and western hemispheres.
Earth can be divided into hemispheres based on either latitude (Northern and Southern Hemispheres) or longitude (Eastern and Western Hemispheres). The equator divides the Northern and Southern Hemispheres, while the Prime Meridian and the International Date Line divide the Eastern and Western Hemispheres.
The Prime Meridian/International Date Line divide the western and eastern hemispheres