Arabian Sea
80 degrees east longitude
The 60 degrees east line of longitude runs through the Ural Mountains.
The 120 degrees east line of longitude passes through Asia and Antarctica.
Fifteen degrees east longitude
Coordinates given in WikiPedia indicate a longitude of 21 degrees east. This puts the point at which this coordinate is set east of the 20 degree line.
The 60 degrees east line of latitude runs through the Ural Mountains.
Africa and Asia are the continents that pass through the 45 degrees East longitude line.
121 degrees east longitude
80 degrees east longitude
Longitude lines measure how far (in degrees) you are East or West of the Prime Meridian (which is a longitude line that runs through Greenwich, England and is designated as 0° longitude).
It is nominally a meridian (a line of longitude) that runs from north to south through the western Pacific Ocean. The basis for the line (which has been moved east and west in several places was the longitude line that is both 180 degrees East and 180 degrees West.
The Ural Mountains lie almost exactly on the 60 degrees east line of longitude.