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Asia and Australia are the only continents that are totally not in the Western hemisphere.
North and South America
There are only two; North and South America.
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There are four continents in the Western Hemisphere, North America fully in the hemisphere, South America fully in the hemisphere, Antarctica partly, Africa partly.
Four continents are almost entirely within the Western Hemisphere: North America, South America, Australia, and Antarctica.
Only 2 continents, North America and South America, are mostly within the Western Hemisphere. Only the Aleutian Islands of Alaska extend into the eastern hemisphere. By technical definition, parts of Western Europe, western Africa, and Antarctica are in the western hemisphere, as well as islands in New Zealand. The western hemisphere includes all areas west of the Prime Meridian at Greenwich, and east of 180° longitude (roughly the same as the International Date Line).
North and South America.
South America is the only continent located entirely in the Western hemisphere.
Only 2 continents, North America and South America, are mostly within the Western Hemisphere. Only the Aleutian Islands of Alaska extend into the eastern hemisphere. By technical definition, parts of western Europe, western Africa, and Antarctica are in the western hemisphere, as well as islands in New Zealand. The western hemisphere includes all areas west of the Prime Meridian at Greenwich, and east of 180° longitude (roughly the same as the International Date Line).