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  2. Tamil units of measurement - Wikipedia

    en.wikipedia.org/wiki/Tamil_units_of_measurement

    The Tamil units of measurement is a system of measurements that was traditionally used in ancient Tamil -speaking parts of South India. These ancient measurement systems spanned systems of counting, distances, volumes, time, weight as well as tools used to do so. While modern India uses the metric system International System of Units (Tamil ...

  3. Rod (unit) - Wikipedia

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

    5.0292 m. The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 161⁄2 feet, equal to exactly 1⁄320 of a mile, or 51⁄2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters.

  4. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    For 6/6 = 1.0 acuity, the size of a letter on the Snellen chart or Landolt C chart is a visual angle of 5 arc minutes (1 arc min = 1/60 of a degree), which is a 43 point font at 20 feet. [10] By the design of a typical optotype (like a Snellen E or a Landolt C), the critical gap that needs to be resolved is 1/5 this value, i.e., 1 arc min.

  5. Shaku (unit) - Wikipedia

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

    Shaku (Japanese: 尺) or Japanese foot[1][2] is a Japanese unit of length derived (but varying) from the Chinese chi, originally based upon the distance measured by a human hand from the tip of the thumb to the tip of the forefinger [3][a] (compare span). Traditionally, the length varied by location or use, but it is now standardized as 10/33 m ...

  6. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    [24] [25] The standard FIFA football pitch for international matches is 105 m (344 ft) long by 68 m (223 ft) wide (7,140 m 2 or 0.714 ha or 1.76 acres); FIFA allows for a variance of up to 5 m (16.4 ft) in length in either direction and 7 m (23.0 ft) more or 4 m (13.1 ft) less in width (and larger departures if the pitch is not used for ...

  7. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    Glossary of mathematical symbols. A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various ...

  8. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    A simple fraction (also known as a common fraction or vulgar fraction, where vulgar is Latin for "common") is a rational number written as a / b or ⁠ ⁠, where a and b are both integers. [9] As with other fractions, the denominator (b) cannot be zero. Examples include ⁠ 1 2 ⁠, − ⁠ 8 5 ⁠, ⁠ −8 5 ⁠, and ⁠ 8 −5 ⁠.

  9. Multiplication sign - Wikipedia

    en.wikipedia.org/wiki/Multiplication_sign

    Different from. Different from. U+0078 x LATIN SMALL LETTER X. Related. See also. U+22C5 ⋅ DOT OPERATOR. U+00F7 ÷ DIVISION SIGN. The multiplication sign (×), also known as the times sign or the dimension sign, is a mathematical symbol used to denote the operation of multiplication, which results in a product.