the prime meridian
Prime meridian
There are 2: The Equator & the Prime (Greenwich) Meridian.
which capital cities are located east of the prime meridian of 0 degrees
The Equator. 0 degrees Longitude is the Greenwich Meridian.
Greenwich, England
That would be the Prime Meridian.
Yes.
Prime Meridian
The Equator is 0 degrees latitude, and the Prime (or Grenwich) Meridian is 0 degrees longitude.
The Prime Meridian.
The prime meridian. And its degrees not decrees.
located on the prime meridian