if the equater is the half way line between north and south, what is the halfway line between east and west?

Answer 1

The geographical division is the combination of the Greenwich (prime) meridian and the international date line.

If you are referring to political divisions then it is the line between Europe (west) and Asia (east). The US is considered in the west. Countries in the middle are the middle east.
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Answer 2

As there is no specific 'east pole' and 'west pole' the question as posed is unanswerable, however the measurement of east and west does have an arbitrary datum line where degrees west and degrees east are measured from. This line is the "Greenwich Meridian", also known as the "Prime Meridian". It starts at the north pole and passes through Greenwich in London on the way to the south pole.

The other significant north-south line is the "International date line". This is not strictly a meridian as it zig-zags rather drunkenly through the middle of the Pacific Ocean.

On a side note; after the Prime Meridian was generally accepted (1884), the French opted-out and used the "Paris Meridian" that they steadfastly stuck with until as late as 1914.

Answer 3

There really is no ultimate east or west. You can go east forever or west forever. So the idea of a halfway point between east and west doesn't make sense.

However, the dividing line between meridians designated east and meridians designated west is the Prime Meridian.

Answer 4

the prime meridian, which goes through London, England and then becomes the international date line when it passes through the north and south poles.

the equator is a natural division made up of the set of points equidistant from the poles. The prime meridian and IDL are man made and are only conceptual for our convenience. East and West have meaning only when used in conjunction with the rotation of the planet to determine "north" and "south".

It happened that the British were pretty much in command of the planet when a system of longitude was developed (as accurate clocks became available for use on ships). I'm betting that the "Prime" meridian goes through London for that reason.

Answer 5

Prime Meridian

Answer 6

The Greenwich meridian at 0 degrees. This continues around the globe up to the North Pole and down to the South Pole.
In Waltham Abbey town shopping pedestrian area in Essex their is a stone set in the pavement. Its outside the electronics/TV shop. The stone has a dividing mark so that its possible to stand with one foot in the Eastern Hemisphere and with the other foot in the Western Hemisphere, (without doing the splits).

Answer 7

The Prime Meridian, for all those who thought they were being clever, is the start and finish, not the halfway. It sits at zero degrees, zero minutes.

In simplest terms, the halfway point is 180 degrees 0 minutes West. There isn't a specific name for it.
Why it's west and not east I don't know, but that's what I was taught.

Answer 8

Prime Meridian

Answer 9

The Prime Meridian.

Answer 10

Prime meridian and 180 degrees

The first goes through Greenwich and the second goes through the middle of the Pacific ocean