Input (grade 10): The north pole is 90 Â N; the south pole is 90 Â S/O. The 0 Â parallel of latitude is designated the equator, the fundamental plane of all geographic coordinate systems.
Output (grade 4): The poles are at 90 Â, the North Pole is at 90 Â N (orth), the South Pole is at 90 Â S (outh). Places with the same latitude are on a circle, around the Earth.