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  2. Ruler - Wikipedia

    en.wikipedia.org/wiki/Ruler

    A variety of rulers A 2 m (6 ft 6 + 3 ⁄ 4 in) carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]

  3. Tape measure - Wikipedia

    en.wikipedia.org/wiki/Tape_measure

    The tape is returned to the case by a spring mechanism. Pocket tape measures have a tape 0.3 to 10 metres (1 ft 0 in to 32 ft 10 in) in length and 6 to 25 millimetres (0.24 to 0.98 in) across. A second tape measure design is what is called the long tape. These are cased tape measures with tapes of up to 200 m in length.

  4. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    A ruler, depicting two customary units of length, the centimeter and the inch. A unit of length refers to any arbitrarily chosen and accepted reference standard for measurement of length. The most common units in modern use are the metric units, used in every country globally. In the United States the U.S. customary units are also in use.

  5. Length measurement - Wikipedia

    en.wikipedia.org/wiki/Length_measurement

    Length measurement, distance measurement, or range measurement (ranging) refers 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. For objects such as crystals and diffraction ...

  6. Graduation (scale) - Wikipedia

    en.wikipedia.org/wiki/Graduation_(scale)

    A ruler with two linear scales: the metric and imperial.It includes shorter minor graduations and longer major graduations. A graduation is a marking used to indicate points on a visual scale, which can be present on a container, a measuring device, or the axes of a line plot, usually one of many along a line or curve, each in the form of short line segments perpendicular to the line or curve.

  7. Ruled paper - Wikipedia

    en.wikipedia.org/wiki/Ruled_paper

    Medium ruled (or college ruled) paper has 9⁄32 in (7.1 mm) spacing between horizontal lines, with a vertical margin drawn about 1+1⁄4 inches (32 mm) from the left-hand edge of the page. Its use is very common in the United States. Narrow ruled paper has 1⁄4 in (8⁄32 in, 6.4 mm) spacing between ruling lines, and is used by those with ...

  8. Scale ruler - Wikipedia

    en.wikipedia.org/wiki/Scale_ruler

    Scale ruler. A scale ruler is a tool for measuring lengths and transferring measurements at a fixed ratio of length; two common examples are an architect's scale and engineer's scale. In scientific and engineering terminology, a device to measure linear distance and create proportional linear measurements is called a scale.

  9. History of measurement - Wikipedia

    en.wikipedia.org/wiki/History_of_measurement

    History of measurement. The earliest recorded systems of weights and measures originate in the 3rd or 4th millennium BC. Even the very earliest civilizations needed measurement for purposes of agriculture, construction and trade. Early standard units might only have applied to a single community or small region, with every area developing its ...

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