Because that's its definition.
When the scale of latitude was invented, zero could have been placed anywhere.
For example, the south pole might have been defined as the zero, and latitudes
on earth would range from zero up to 180° at the north pole. But instead, it was
decided to put zero in the middle, and call the south latitudes negative and the
north ones positive.
All parallels, or latitudes, cross 0 degrees longitude. 0 degrees longitude is the prime meridian. 0 degrees latitude, or parallel, is the equator
The intersection of 0 degrees latitude and 0 degrees longitude is known as the Prime Meridian and the Equator.
they are
The equator and the Prime meridian meet at zero degrees latitude and longitude.
0 degress latitude is the Equator and 0 degress longitude is the Greenwich Meridian.
All parallels, or latitudes, cross 0 degrees longitude. 0 degrees longitude is the prime meridian. 0 degrees latitude, or parallel, is the equator
The intersection of 0 degrees latitude and 0 degrees longitude is known as the Prime Meridian and the Equator.
0 degrees
The Equator is 0 degrees latitude, and the Prime (or Grenwich) Meridian is 0 degrees longitude.
The equator is located at 0 degrees latitude and does not have a fixed longitude. It circles the Earth halfway between the North and South poles.
its the equator
Equator
the direction that longitude run is 0 the 180 degrees and also east and west
they are
The equator is located at 0 degrees latitude. It is an imaginary line that divides the Earth into the Northern and Southern Hemispheres. The longitude of the equator varies continuously from 0 to 180 degrees as you move around the Earth.
The equator and the Prime meridian meet at zero degrees latitude and longitude.
0 degress latitude is the Equator and 0 degress longitude is the Greenwich Meridian.