0 degrees
'Lines' of longitude are called "meridians".The equator is not one of them.
The equator is a latitude line, so it has no specific longitude. The equator is at 0o north or south. There are many points on the equator, so every point on the equator has a different longitude.
The equator and the lines of longitude.
I think its called the equator.
Look in a dictionary for LATITUDE, LONGITUDE, and HEMISPHERE.
The equator and all lines of longitude are called great circles because the represent the circumference of the earth. The other latitude lines along the globe are smaller then the actually circumference.
Zero longitude is the prime meridian. Zero latitude is the Equator.
All lines of longitude pass through the Equator.
Nothing (on Earth) is east of the equator. It's east of the prime meridian ... and it's called 66.5 degrees east longitude.
The imaginary lines perpendicular to the equator are lines of longitude, also known as meridians. These lines run from the North Pole to the South Pole and help determine a location's east-west position on the Earth's surface. The prime meridian, located at 0 degrees longitude, is the starting point for measuring longitude.
Longitudinal or longitude lines are the imaginary lines that are perpendicular to the equator. Latitudinal or latitude lines are parallel to the equator.
The answer is simple. It's called the equator, for the longitude it is called prime meridian.