SI supplementary unit

SI supplementary unit

Until 1995, SI ("International System of Units") supplementary units were:

QuantitySymbolName of SI supplementary unitSymbol for SI unit
angle"radianrad
solid angle"steradiansr

As of October 1995, the category of "supplementary units" has been abolished from the SI system of measurement, and the radian and the steradian are now considered SI derived units.

ee also

*SI derived unit


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