A foot (plural: feet or foot; 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. Its size can vary from system to system, but in each is around a quarter to a third of a metre. The most commonly used foot today is the international foot. There are 3 feet in a yard and 12 inches in a foot.
What is a Meter?
(from Wikipedia)
The metre or meter (symbol: m) is the fundamental unit of length in the International System of Units (the SI). It was originally defined so that the land distance between Earth's poles and Equator would be exactly 10,000,000 metres; today, the way it is defined means the speed of light is exactly 299,792,458 metres per second.
Because it is the unit of length in the SI, all SI units that involve length (such as area or speed) are defined in terms of the metre, as are vectors.
As with all metric units, decimal multiples and submultiples of the metre— such as kilometre (1,000 metres) and centimetre (0.01 metres)— can be formed by adding SI prefixes to its name or symbol.
