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2. Foot (unit) - Wikipedia

   en.wikipedia.org/wiki/Foot_(unit)

   In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet. Since an international agreement in 1959, the foot is defined as equal to exactly 0.3048 meters. Historically, the "foot" was a part of many local systems of units, including the Greek, Roman, Chinese, French, and English systems. It varied in ...

3. Unit of length - Wikipedia

   en.wikipedia.org/wiki/Unit_of_length

   The basic unit of length in the imperial and U.S. customary systems is the yard, defined as exactly 0.9144 m by international treaty in 1959. [2] [5] Common imperial units and U.S. customary units of length include: [6] thou or mil (1 ⁄ 1000 of an inch) inch (25.4 mm) foot (12 inches, 0.3048 m) yard (3 feet, 0.9144 m)

4. Length measurement - Wikipedia

   en.wikipedia.org/wiki/Length_measurement

   Length measurement, distance measurement, or range measurement (ranging) all refer to the many ways in which length, distance, or range can be measured. The most commonly used approaches are the rulers, followed by transit-time methods and the interferometer methods based upon the speed of light. Surveying is one ancient use of measuring long ...

5. System of units of measurement - Wikipedia

   en.wikipedia.org/wiki/System_of_units_of_measurement

   The American football field, which has a playing area 100 yards (91.4 m) long by 160 feet (48.8 m) wide. This is often used by the American public media for the sizes of large buildings or parks. It is used both as a unit of length (100 yd or 91.4 m, the length of the playing field excluding goal areas) and as a unit of area (57,600 sq ft or ...

6. Irish units of measurement - Wikipedia

   en.wikipedia.org/wiki/Irish_units_of_measurement

   Table of length units; Unit Meaning Relative value SI value Imperial value Notes grán : grain 1 ⁄ 36: 0.7 cm 1/4 inch ordlach: thumb-length 1 ⁄ 12: 2.1 cm 0.8 in bas: palm 1 ⁄ 3: 8.4 cm 3.3 in dorn: fist 5 ⁄ 12 or 1 ⁄ 2: 10.4 or 12.5 cm 4 or 5 in troighid: foot 1 25 cm 9.9 in céim: step 2.5 62.5 cm 2 ft 1 in deiscéim[m] double-step ...

7. Rod (unit) - Wikipedia

   en.wikipedia.org/wiki/Rod_(unit)

   A traditional unit of volume for stone and other masonry. A perch of masonry is the volume of a stone wall one perch (16 + 1 ⁄ 2 feet or 5.03 metres) long, 18 inches (45.7 cm) high, and 12 inches (30.5 cm) thick. This is equivalent to exactly 24 + 3 ⁄ 4 cubic feet (0.92 cubic yards; 0.70 cubic metres; 700 litres).