Fahrenheit is a customary unit
customary
it is in the us customary unit or else we wouldnt be learning about. there for it is in the us customary unit.
It is a customary unit.
customary
It is a customary unit.
A Customary Unit or non-SI unit is a measurement unit that is not part of the metric system. Customary units are mainly units of the Imperial system but they could be localised customary units - such as Gaj (for area) is South Asia.
It is the basic unit of time in both systems.
The pound is NOT a metric unit.
A "gran" is a German measurement, it is neither customary or metric. A "gram" is a metric unit.
Metric.
what is the customary unit of length