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( Square kilometre)
Square kilometre (U.S. spelling square kilometer), symbol km2, is a decimal multiple of the SI unit of surface area, the square metre, one of the SI derived units. 1 km2 is equal to Conversely Note "km2" means (km)2, square kilometre or kilometre squared, and not k(m2), kilo–square metre. For example, 3 km2 is equal to 3 × (1,000 m)2 = 3,000,000&_160;m2, not 3,000&_160;m2. The 106 m2 orders of magnitude page gives comparisons with geographic areas.
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