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  2. Letter (paper size) - Wikipedia

    en.wikipedia.org/wiki/Letter_(paper_size)

    The Reagan administration made Letter-size paper the norm for US federal forms in the early 1980s; previously, the smaller "official" Government Letter size, 8 by 10.5 inches (203.2 by 266.7 mm) (aspect ratio: 1.3125), was used in government, while 8.5-by-11-inch (215.9 by 279.4 mm) paper was standard in most other offices. [2]

  3. Aspect ratio - Wikipedia

    en.wikipedia.org/wiki/Aspect_ratio

    For example, the aspect ratio of a rectangle is the ratio of its longer side to its shorter side—the ratio of width to height, [1] [2] when the rectangle is oriented as a "landscape". The aspect ratio is most often expressed as two integer numbers separated by a colon (x:y), less commonly as a simple or decimal fraction .

  4. One half - Wikipedia

    en.wikipedia.org/wiki/One_half

    One half is the rational number that lies midway between 0 and 1 on the number line. Multiplication by one half is equivalent to division by two, or "halving"; conversely, division by one half is equivalent to multiplication by two, or "doubling". A square of side length one, here dissected into rectangles whose areas are successive powers of ...

  5. 1/2 + 1/4 + 1/8 + 1/16 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1/2_%2B_1/4_%2B_1/8_%2B_1/...

    In mathematics, the infinite series ⁠ 1 / 2 ⁠ + ⁠ 1 / 4 ⁠ + ⁠ 1 / 8 ⁠ + ⁠ 1 / 16 ⁠ + ··· is an elementary example of a geometric series that converges absolutely. The sum of the series is 1.

  6. 0x88 - Wikipedia

    en.wikipedia.org/wiki/0x88

    In this scheme each nibble represents a rank or a file, so that the 8-bit integer 0x42 represents the square at (4,2) in zero-based numbering, i.e. c5 in standard algebraic notation. [ 1 ] Adding 16 to a number for a square results in the number for the square one row above, and subtracting 16 results in the number for the square one row below.

  7. Multiplication table - Wikipedia

    en.wikipedia.org/wiki/Multiplication_table

    Figure 2 is used for the multiples of 2, 4, 6, and 8. These patterns can be used to memorize the multiples of any number from 0 to 10, except 5. As you would start on the number you are multiplying, when you multiply by 0, you stay on 0 (0 is external and so the arrows have no effect on 0, otherwise 0 is used as a link to create a perpetual cycle).

  8. 8x8 - Wikipedia

    en.wikipedia.org/wiki/8x8

    [8] [9] In 1999, 8x8 acquired two companies, Odisei [10] and U|Force, [11] to acquire network and server VoIP technologies. [12] [13] In March 2000, 8x8 relaunched itself as a VoIP service provider under the name Netergy Networks. [14] The company changed its name back to 8x8 in July 2001. [15] 8x8 began trading on the Nasdaq SmallCap Market on ...

  9. 1/8 - Wikipedia

    en.wikipedia.org/wiki/1/8

    1/8 or 1 ⁄ 8 may refer to: January 8 (in month-day date notation) 1 August (in day-month date notation) the Fraction one eighth, 0.125 in decimals, and 12.5% in ...