Answer:
There are 4 hemispheres, eastern, western, southern, and northern. The Equator, or line of 0 degrees latitude, divides the Earth into the Northern and Southern hemispheres. It is also known as a half-sphere. And geographers, or people who study Earth, have divided the planet into two sets of two hemispheres. These are the Northern and Southern hemispheres and the Eastern and Western hemispheres.
Step-by-step explanation: