Prime Meridian.
west and east
East-West
Lines of longitude run north-south and measure east-west.
They measure east and west
Longitude lines.
Longitude is the correct answer
east west
east west
Either or both.
Lines of longitude, also known as meridians, measure the distance east or west of the Prime Meridian, which runs through Greenwich, England. They help determine a location's position in terms of longitude on the Earth's surface.
Longitude lines. They are also called meridians.
Latitude: Lines the run North and South but measure east and west.