The maximum degree of longitude is 180 degrees east and west, so 210 degrees longitude is impossible.
The 150 degrees west longitude line runs through the continent of Antarctica.
The 210 degrees longitude line passes through the continent of North America.
Antarctica, but when we're talking about degrees north or south, we say latitude, but when its degrees east or west, we say longitude Antarctica is located at 80 degrees south latitude.
Europe, Africa and Antarctica
90˚ N is the North Pole, which is located on no continent. 90˚S is the South Pole, which is located in Antarctica.
Antarctica. The South Pole is at 90 degrees S latitude. The North Pole is at 90 degrees N latitude. All lines of longitude converge at both poles.
The question is confusing. Antarctica is counted among the continents, so any point you specify in Antarctica is on the Antarctic continent. And in that regard, I must also remark that your description of the places you're referring to is none too clear either. It's not correct to describe a place as being "210 degrees longitude line".
There is no country at the coordinates 80 degrees south latitude and 140 degrees west longitude. It is a point on the continent of Antarctica.
"30 degrees east longitude" is the description of a line that joins the north and south poles and crosses territory in Europe, Asia, Africa, and Antarctica. "150 degrees west longitude" is the description of a line that joins the north and south poles and crosses territory in North America and Antarctica.
The longitude of Antarctica varies because it is a large continent. The coordinates for the South Pole, which is located in Antarctica, are approximately 0 degrees longitude, as it is where all lines of longitude converge.
Including its coastal islands, Antarctica occupies a range of more than 50° degrees of latitude, and all 360° of longitude.
The meridian of 60 degrees west longitude crosses parts of North America, South America, and Antarctica.