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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 …) |
A square inch (plural: square inches) is a unit of area, equal to the area of a square with sides of one inch.
The deciare is ten square metres.