The prime meridian. And its degrees not decrees.
The prime meridian is located at 0 degrees longitude.
The equator is located at 0 latitude. Fullstop. Being a parallel it spans the whole range in longitude, from 0 to 180 and back again.
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.
One country that is located at 135 E longitude is Japan.
The Prime Meridian
Antarctica is located 0 degrees north and 40 degrees east.
The Equator is 0 degrees latitude, and the Prime (or Grenwich) Meridian is 0 degrees longitude.
The country located at 9 degrees north latitude and 0 degrees longitude is Ghana.
Yes.
Greenwich, England is located exactly at 0 degrees longitude, and it is considered the starting point for measuring longitude around the world.
That is the center of the coordinate system, which uses latitude and longitude.
The equator is defined as the zero reference line of latitude.