Units of measurement
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Square centimeter (cm²)
Square kilometer (km²)
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Square centimeter (cm²)
A square centimeter (cm²) is a unit of area equal to a square with sides of 1 cm. It is commonly used in physics, geometry, and everyday measurements.
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.