If you travel all the way around the earth without touching the north or south
pole, then you travel through 360 degrees of longitude.
They're labeled (zero -- 180) east and (zero -- 180) west.
+180 degrees.
An angle which is more than 180 degrees but less than 360 degrees is called a reflex angle.
An angle that measures more than 90 degrees and les than 180 degrees is an obtuse angle.
If they're less than 180 degrees, they're obtuse angles. If more than 180 degrees, they're reflex angles. (Exactly 180 degrees is a 'straight' angle.)
The greatest number of degrees anyone can be from the prime meridian is 180 degrees. This is because the prime meridian itself is located at 0 degrees longitude, and the maximum longitude value is 180 degrees both east and west. Therefore, any location can be a maximum of 180 degrees away from the prime meridian.
It could be, but it never is. If you start at zero and travel 210 degrees of longitude in one direction, that brings you to the place that you could have reached by traveling only 150 degrees in the other direction. Halfway around is 180 degrees, so that's as high as longitude is ever marked, because if you go more than 180 degrees, then it would have been shorter to go less than 180 degrees the other way.
The difference between those two positions is 180 degrees in longitude.
360 degrees. Longitude runs from 180 degrees East to -180 degrees West.
Since the whole epic drama is playing out on the surface of a sphere, and all latitude and longitude measurements are really angles on the sphere, you can never be more than 180 degrees away from any latitude or longitude that anybody wants to name.
180 degrees
+180 degrees.
180 degrees is both east and west longitude. It doesn't matter which way you gofrom the Prime Meridian ... if you go 180 degrees, you arrive at the same longitude.
There is no difference between 180 degrees east and 180 degrees west longitude because the Earth is divided into the eastern and western hemispheres, each having 180 degrees of longitude each. Therefore, 180 degrees east and west longitude means the same thing --- 180 degrees longitude.
There is no 200 degrees of longitude. There is 180 degrees west of the Greenwich Meridian and 180 degrees east of the Greenwich Meridian. All degrees of longitude on earth converge at the South and North Poles.
An angle which is more than 180 degrees but less than 360 degrees is called a reflex angle.
180
The Antimeridian.