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Foot (unit of length) - Wikipedia, the free encyclopedia |
 | | A foot (plural: feet; symbol or abbreviation: ft or, sometimes, ′ – a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. |
 | | The international standard symbol for a foot is "ft" (see ISO 31-1, Annex A). |
 | | In some cases, the foot is denoted by a prime, which is often approximated by an apostrophe, and the inch by a double prime. |
| en.wikipedia.org /wiki/Foot_(unit_of_length) (1041 words) |
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