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Area conversions convert between square units: square feet, square meters, acres, hectares, and square kilometers. Area scales as the square of length — doubling all linear dimensions quadruples the area.

Hướng dẫn từng bước

1. 11 acre = 43,560 sq ft = 4,047 m²
2. 21 hectare = 10,000 m² = 2.471 acres
3. 31 sq mile = 640 acres = 2.59 km²
4. 41 sq ft = 0.0929 m²; 1 m² = 10.764 sq ft

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