It is the Prime Meridian
No. 90 degrees longitude is not a major line of longitude. Only 0 and 180 degrees longitude, which are the Greenwich Meridian and the International Date Line respectively, are major lines of longitude.
Another name is Prime Meridian.
It is the Prime Meridian
The international date line (or there abouts)
The Prime Meridian.
Fifteen degrees east longitude
Greece
0 degress latitude is the Equator and 0 degress longitude is the Greenwich Meridian.
Their is not an that is 180 degrees. This would only make a line.
The 0 degrees longitude line is known as the Greenwich Meridian. From its name, it originated in Greenwich, a district in East London.
They are called the lines of longitude. Lines of longitude range from 0 degrees on the prime meridian to 180 degrees.
The Equator. 0 degrees Longitude is the Greenwich Meridian.