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SI supplementary unit

SI (International System of Units) supplementary units are:

Quantity	Symbol	Name of SI supplementary unit	Symbol for SI unit
angle	θ	radian	rad
solid angle	Ω	steradian	sr

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.

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