"90 degrees north" is the definition of the north pole. It's a single point which stays
right there and does not run, and is not associated with any one specific continent.
Only Costa Rica.
There is no such place on Earth as "east of the north pole".
Belarus, Poland, and Russia
Mexico City for example is 19 degrees north, so no it is not
The Balkans run through countries such as Slovenia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro, Kosovo, Albania, North Macedonia, Greece, Bulgaria, and Romania.
No, it is found at 23.5 degrees north and south of the equator. It doesn't run thru North America
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.
Kenya, Uganda, Dem. Rep of Congo, Congo, Gabon, Somalia
Russia, Kazakhstan, Uzbekistan, Tajikistan, Kyrgyzstan, Afghanistan, Pakistan, India
Latitude lines run east and west, like the equator, and give a location in degrees north or south of the equator. Longitude lines run from pole to pole and give a location in degrees either east or west of the Prime Meridian, which runs through Greenwich, England, as well as France, Spain, Algeria, and some countries in west Africa.
There are no countries on Antarctica.
The Alps run through eight countries in south-central Europe. They start at Mediterranean sea and run north following the border between France and Italy. They then run east through Switzerland, Liechtenstein, Austria, Germany, Monaco, and Slovenia.