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Under the Harappan linear measures, Indus cities during the Bronze Age used a foot of 13.2 inches (335 mm) and a cubit of 20.8 inches (528 mm). [11] The Egyptian equivalent of the foot—a measure of four palms or 16 digits—was known as the djeser and has been reconstructed as about 30 cm (11.8 in).
For measuring length, the U.S. customary system uses the inch, foot, yard, and mile, which are the only four customary length measurements in everyday use.From 1893, the foot was legally defined as exactly 1200 ⁄ 3937 m (approximately 0.304 8006 m). [13]
In the People's Republic of China, since 1984, the chi has been defined as exactly 1/3 of a metre, i.e., 33 + 1 ⁄ 3 cm (13.1 in). However, in the Hong Kong SAR the corresponding unit, pronounced tsek (cek3) in Cantonese, is defined as exactly 0.371475 m (1 ft 2.6250 in) or 1 7/32 ft. [2] The two units are sometimes referred to in English as "Chinese foot" and "Hong Kong foot".
A fire hydrant marked as 3-inch. The inch (symbol: <3 or ″) is a unit of length in the British Imperial and the United States customary systems of measurement.It is equal to 1 / 36 yard or 1 / 12 of a foot.
American surveyors use a decimal-based system of measurement devised by Edmund Gunter in 1620. The base unit is Gunter's chain of 66 feet (20 m) which is subdivided into 4 rods, each of 16.5 ft or 100 links of 0.66 feet. A link is abbreviated "lk", and links "lks", in old deeds and land surveys done for the government.
It was 1 ⁄ 6 of a ligne or 1 ⁄ 864 of the smaller French foot. ligne: 1 ⁄ 144: 2.256 mm 88.81 thou 1 ⁄ 12 of a pouce. This corresponds to the line, a traditional English unit. pouce: 1 ⁄ 12: 27.07 mm 1.066 in 1 ⁄ 12 of a pied du roi. This corresponds to the inch, a traditional English unit. pied du roi: 1 32.48 cm 1.066 ft
(Furlongs remained the same, but the rod changed from 15 old feet to 16 1 ⁄ 2 new feet. [10]) In 1324 Edward II systematized units of length by defining the inch as 3 barleycorns, the foot as 12 inches, the yard as 3 feet, the perch as 5 1 ⁄ 2 yards, and the acre as an area 4 by 40 perches. [2]
The 1:64 scale originated by halving the common 1:32 scale, which was known as "standard size" in some hobbies. This smaller scale became successful because of its relative size in comparison to other toys, the fact that it is a derivative of the 1/16 scale, and because small hands easily hold them. [ 1 ]
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