The latitude and longitude lines can cover the globe to form a grid, called a graticule. The point of origin of the graticule is (0,0), where the equator and the prime meridian intersect. Source: http://publib.boulder.ibm.com/
It doesn't really have a name though some call it Standard Origin. It is zero degrees in all directions.
equator i think
Africa
All of those markers cross Africa.
All four of those imaginary lines cross Africa.
South Atlantic Ocean - close to Bight of Benin
equator i think
The Prime Meridian and the equator cross this continent - Africa (Correct me if i am wrong please!)
Nothing at all.
Africa
Africa
Africa
Africa
equator prime meridian
Africa
The Prime Meridian and the Equator intersect in the sea off the west African coast. So the continent is Africa and, according to Google, it is off the Ivory Coast/Gabon.
Africa, since the equator and the Prime Meridian both cross it.
All of those markers cross Africa.