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The 80th meridian east is a line of longitude located 80 degrees east of the Prime Meridian, which is the line of longitude defined to be 0 degrees. Meridians are used in geographic coordinate systems to help indicate specific locations on the Earth's surface.

Ancestors (6)

  1. Meridians (geography)
  2. Geodesy
  3. Applied mathematics
  4. Fields of mathematics
  5. Mathematics
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