Square centimeter (cm²)
Definition: A square centimeter (symbol: cm²) is the area of a square with sides of one centimeter. It equals one ten-thousandth of a square meter.
History/origin: Like other metric derived units, the square centimeter spread with the adoption of the metric system for science, education, trade, and everyday measurement.
Current use: Square centimeters are common in school geometry, packaging dimensions, small object surfaces, and medical contexts such as wound size measurement.


