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  2. Simpson's rule - Wikipedia

    en.wikipedia.org/wiki/Simpson's_rule

    Application of the second rule to the region of 3 points generates 1/3 Simpson's rule, 4 points - 3/8 rule. These rules are very much similar to the alternative extended Simpson's rule. The coefficients within the major part of the region being integrated are one with non-unit coefficients only at the edges.

  3. 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.

  4. Ruler - Wikipedia

    en.wikipedia.org/wiki/Ruler

    A variety of rulers A 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 metre/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]

  5. Slide rule - Wikipedia

    en.wikipedia.org/wiki/Slide_rule

    Inverting this process allows square roots to be found, and similarly for the powers 3, 1/3, 2/3, and 3/2. Care must be taken when the base, x, is found in more than one place on its scale. For instance, there are two nines on the A scale; to find the square root of nine, use the first one; the second one gives the square root of 90.

  6. Scale ruler - Wikipedia

    en.wikipedia.org/wiki/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.

  7. Tape measure - Wikipedia

    en.wikipedia.org/wiki/Tape_measure

    Unlike US rulers, of which an overwhelming majority contain both centimeter and inch scales, tape measures are longer and thus traditionally have had scales in both inches and feet & inches. So, the inclusion of a metric scale requires the measuring device either to contain 3 scales of measurement or the elimination of one of the US Customary ...

  8. Metre-stick - Wikipedia

    en.wikipedia.org/wiki/Metre-stick

    In the United States, the marking is usually in customary units (three feet 3 + 38 inches with inch and fractional inch). Hybrid measures bearing customary markings on one side and metric units on the other also exist and are sometimes referred to as yardsticks, metre-whesticks [citation needed] or "metre rulers". The spelling meter vs ...

  9. Slide rule scale - Wikipedia

    en.wikipedia.org/wiki/Slide_rule_scale

    Gauge marks are often added to the scales either marking important constants (e.g. π at 3.14159) or useful conversion coefficients (e.g. ρ" at 180*60*60/π or 206.3x10 3 to find sine and tan of small angles [18]). [19] [20] A cursor may have subsidiary hairlines beside the main one. For example, when one is over kilowatts the other indicates ...