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Sierra Leone is the world’s roundest country and Egypt the squarest

Sierra Leone is the world’s roundest country and Egypt the squarest one according to Argentinian mathematician Gonzalo Ciruelos and Australian geo-statistician David Barry.

The two came up with equations separately that can calculate a country’s rectangular-ness or roundness defined by a number between 0 and 1 with 1 being a perfect rectangle or round.

List of countries or dependencies in order of their rectangular-ness

  1. Egypt (most rectangular)
  2. Vatican
  3. Sint Maarten
  4. Lesotho
  5. Yemen
  6. Ghana
  7. Macedonia
  8. Ivory Coast
  9. Poland
  10. Neru
  11. Sudan
  12. Swaziland
  13. Uruguay
  14. Sierra Leone
  15. Turkey (least rectangular)

List of countries or dependencies in order of their roundness

  1. Sierra Leone (most round)
  2. Naura
  3. Zimbabwe
  4. Vatican
  5. Poland
  6. Scarborough Reef
  7. Ivory Coast
  8. Suriname
  9. Swaziland
  10. Uruguay
  11. Romania
  12. Sudan
  13. Ethiopia
  14. Botswana
  15. San Marino (least round)
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