1 cm = 10-5 km so 1 sq cm = 10-10 sq km so 10 cm = 10-9 sq km ie a billionth of a sq km.
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1 km = 105 cm so 1 sq km = (105)2 = 1010 or 10 billion sq cm.
3716121.6 sq. cm 371.61216 sq. meters 0.00037 sq. km 576000 sq. inch 444.44444 sq. yard 0.00014 sq. miles 0.03716 hectares 0.09183 acres
3621 sq cm or 0.3621 sq metres.
320 sq. ft. equals: 35.56 sq yd 297289.73 sq cm 29.73 sq m 0.01 sq km 46080 sq inch
There are 7 continents as follows - Africa - 30,300,000 sq km Antarctica - 14,000,000 sq km approx Asia - 44,700,000 sq km Australia - 7,686,850 sq km Europe - 9,940,000 sq km North America - 24,360,000 sq km South America - 17,770,000 sq km