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What is the Foot ?

Source: en.citizendium.org

" The foot (plural foot or feet; symbol or abbreviation: ft or the single prime ′ ) is a unit of length in the Imperial and U.S. customary systems of measurement. It is equal to 12 inches or one third of a yard.
It is used primarily in the United States and, although it has been officially superseded by units of the metric system, it is still commonly used in the United Kingdom.
Historically the "foot" was a part of many local systems of units, including the Greek, Roman, Chinese, French, and English systems (...) "

Length Units

Millimeter Centimeter Meter Kilometer Mile Yard Foot Inch

Temperature Units

Celsius Kelvin Fahrenheit

Area Units

Acre Square meter Square kilometer Hectare Square mile Square yard Square foot Square inch

Volume Units

Cubic meter Cubic foot Cubic inch Liter Milliliter Imperial gallon US liquid gallon

Weight Units

Milligram Gram Kilogram Metric Ton Pound Ounce Carat

Time Units

Second Millisecond Minute Hour Day Week Month Year

Speed Units

meter / second kilometer / hour mile / hour

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