At the Greenwich meridian, and the international date line.
At the poles.
Longitude lines connect the North and South Poles and measure distances east or west of Greenwich.
both .. longitude measures from north to south or from south to north the same with latitude.
Because it is where east and west are measured from. Sort of like zero is neither positive nor negative.:)
!80 degrees east of Greenwich and then one crosses over to West Longitude
They don't, east and west are a determined direction of travel from the point where you are located. No matter where you are you can always go west or east.ANSWEROn the prime meridian and the International dateline, at 180 degress, East or West.
The longitude of a location is its angle east or west of the Prime Meridian.
Longitude lines. They are also called meridians.
Lines of longitude run north-south and measure east-west.
longitude
East to west- Latitude Lines North to south- Longitude Lines
Lines that run east and west is called Latitude. The opposite lines are known as longitude.
Longitude lines.
west and east
East-West
From east to west
Lines of longitude measure how far something is east or west of the Prime Meridian.
east west