1。 Antarctica Antarctica, Antarctica is surrounded by a piece of land, so one side of the Antarctic continent, only the Arctic Ocean, is surrounded by a piece of Wang Yang, so the edge of this continent is the Arctic.

2。 The equator is the place with the longest latitude. Find the longest horizontal line to sort it out.

3。 East longitude 180 degrees, 180 degrees A hemisphere has a boundary degree of 20 degrees, and then a hemisphere has 9 meridians, Greenwich Observatory and British prime meridian, so the British meridian is 0 degrees longitude, from which the meridian is left and the right is east longitude.

Latitude += 180 (this statement is not standardized, so to speak), the resolution is 20 degrees, and then a hemisphere with 9 latitudes is between the longest latitude of 0 degrees, and the latitude is between the south latitude and the north latitude.

If you don't understand, welcome to consult, thank you!