Units of measurement
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Square inch (in²)
Square rod (rd²)
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Square inch (in²)
A square inch (in²) is a unit of area in the British and American measurement systems, equal to a square with a side of 1 inch (2.54 cm).
Square rod (rd²)
A square rod (rd²) is an old British unit of area, equal to 25.29 m² or 1/160 acre.