A Foot is a unit of length, roughly corresponding to the length
of an average person’s foot. It is about 30 centimetres.
A tall person is about 6 feet high. 6 feet is sometimes written
6’. A foot is subdivided into 12 inches. There are 5280
feet in a mile. The international standard symbol for a foot
some cases, the foot is denoted by a prime, which is often
approximated by an apostrophe, and the inch by a double prime.
For example, 2 feet 4 inches is denoted as 2'4''. This use
can cause confusion, because the prime and double prime are
also international standard symbols for arcminutes and arcseconds.