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Symbol | Definition |
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≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |
Square centimetre (International spelling as used by the International Bureau of Weights and Measures) or square centimeter (American spelling), symbol cm2, is the SI unit of area or surface area.
square chain is a unit of area.