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The square kilometre (square kilometer in American spelling; symbol: km2) is a multiple of the square metre, the SI unit of area or surface area. 1 km 2 is equal to: 1,000,000 square metres (m 2) 100 hectares (ha) It is also approximately equal to: 0.3861 square miles [ 2 ] 247.1 acres [ 3 ] Conversely:
Square Kilometre Array. The Square Kilometre Array (SKA) is an intergovernmental international radio telescope project being built in Australia (low-frequency) and South Africa (mid-frequency). The combining infrastructure, the Square Kilometre Array Observatory (SKAO), and headquarters, are located at the Jodrell Bank Observatory in the United ...
Dymaxion map of the world with the 30 largest countries and territories by area. This is a list of the world's countries and their dependencies by land, water, and total area, ranked by total area.
This is a list of countries and dependencies ranked by population density, sorted by inhabitants per square kilometre or square mile. The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1. The list also includes unrecognized but de facto independent countries.
(km 2) Population Urban population density (per km 2) Greater Los Angeles United States: 87,940 18,316,743 541.1 San Francisco-Oakland-San Jose (Bay Area) United States: 26,390 9,710,000 953 New York City (New York City Metropolitan Area) United States: 12,093 20,902,000 1,728 Boston–Providence United States: 9,539 7,340,000 769 Tokyo ...
The British Empire (red) and Mongol Empire (blue) were the largest and second-largest empires in history, respectively. The precise extent of the either empire at its greatest territorial expansion is a matter of debate among scholars. Several empires in human history have been contenders for the largest of all time, depending on definition and ...
The second largest state, Texas, has only 40% of the total area of the largest state, Alaska. Rhode Island is the smallest state by total area and land area. San Bernardino County is the largest county in the contiguous U.S. and is larger than each of the nine smallest states; it is larger than the four smallest states combined.
50,000 to 100,000 square kilometers • 30,000 to 50,000 square kilometers • 20,000 to 30,000 square kilometers • 10,000 to 20,000 square kilometers; 7,000 to 10,000 square kilometers • 5,000 to 7,000 square kilometers • 3,000 to 5,000 square kilometers • 1,000 to 3,000 square kilometers; 250 to 1,000 square kilometers • 0.1 to 250 ...