Surface measurement {area measurement} is length squared or square meters (m^2). Area measure can be 1000 m^2 {hectare}, which is 2.5 acres. In English measure, area can be 10 square chains, 160 square rods, or 0.4047 hectare {acre} or can be 36 square miles {township}. 640 acres equals 1 square mile. For cross-sections {cross-sectional area}, 1 barn is 10^-28 cm^2.
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Date Modified: 2022.0224