Units of measurement
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Ar (a)
Quadratrute (rd²)
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Ar (a)
An are (a) is a unit of area measurement equal to 100 m² (10×10 m). It is used in agriculture and cadastral measurements.
Quadratrute (rd²)
A square rod (rd²) is an old British unit of area, equal to 25.29 m² or 1/160 acre.