The equator does not cross Argentina.
Yes, there are three South American countries that lie on the equator: Colombia, Ecuador, and Brazil.
Brazil and Indonesia are the two countries that lie in both the northern hemisphere and the southern hemisphere. Brazil crosses the equator and is located in both hemispheres, while Indonesia is made up of islands that straddle the equator.
North America and Europe lie entirely north of the equator. Almost all of Asia, most of Africa, and a part of South America are above the equator. Only Australia and Antarctica are entirely south of the equator, substantially so.
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Europe and North America
Europe is well above the Equator and can be considered to be in the northern hemisphere.
Only Indonesia, in Asia.
the five countries that lies on the equator are brazil,arab,jamaica,west aferica,and arab
Europe is north of the Equator, so it is in the Northern Hemisphere.
There are six African countries that lie on the equatorial line. They are Gabon, Congo, DR Congo, Uganda, Kenya, and Somalia.
The equator crosses states of Ecuador, Colombia, and Brazil, as well as states or provinces of the African and Asian countries that straddle it. It doesn't cross any place in the USA.