The Foot is used worldwide to measure altitude in the aviation industry. The origin of the name is generally accepted as being related to the average size of an adult's foot. With the standardization of measures in 1958, it was established that one foot would correspond to twelve inches and that three feet would form a yard. Sometimes, for brevity, an apostrophe is used to symbolize this measure, whereas in the inch a double apostrophe is used. Thus, 8 feet and 2 inches can be represented by 8'12''. To conclude, and as a curiosity, be aware that the exact measurements of a soccer field goal are eight feet high by 24 feet in length.
Since 1983, the Meter has officially been defined as the length of the path traveled by the light in a vacuum during a certain time interval. The idea of a unified system of measures was first implemented in France at the time of the French Revolution. In the year 1789 a request was made to the members of the Academy of Sciences of that nation to create a unified system of measures. This system had several advantages compared to the previous ones, since the measures ceased to depend on parts of the human body, as they were until then, thus ceasing to be so arbitrary. This system was later followed by most countries in the world. According to the International System of Measures, the meter is considered to be the main unit of length measurement.
|feet to meter||feet to meter|
|1 ft = 0,3048 m||15 ft = 4,5721 m|
|2 ft = 0,6096 m||20 ft = 6,0961 m|
|3 ft = 0,9144 m||25 ft = 7,6201 m|
|4 ft = 1,2192 m||30 ft = 9,1441 m|
|5 ft = 1,5240 m||35 ft = 10,6681 m|
|6 ft = 1,8288 m||40 ft = 12,1921 m|
|7 ft = 2,1336 m||50 ft = 15,2402 m|
|8 ft = 2,4384 m||60 ft = 18,2882 m|
|9 ft = 2,7432 m||70 ft = 21,3363 m|
|10 ft = 3,0480 m||80 ft = 24,3843 m|
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