Units of measurement
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Rood (rood)
Square kilometer (km²)
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Rood (rood)
A rood is an old British unit of area measurement, equal to 1/4 acre (1011.71 m²).
Square kilometer (km²)
A square kilometer (km²) is used for measuring large areas, such as cities, forests, and countries. One km² equals 1,000,000 m².