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  2. Atari Calculator - Wikipedia

    en.wikipedia.org/wiki/Atari_Calculator

    The Atari Calculator was not the only RPN calculator for Atari 800, there was also the commercial RPN Calculator (ID numbers APX-10105 and APX-20105), written in Atari BASIC by John Crane, [19] [20] [21] and the Atari Rechner Simulation mit UPN by MTC (imitating hardware RPN calculator). [22] [23] [24]

  3. Matrix (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Matrix_(mathematics)

    In mathematics, a matrix (pl.: matrices) is a rectangular array or table of numbers, symbols, or expressions, with elements or entries arranged in rows and columns, which is used to represent a mathematical object or property of such an object.

  4. Dividing a square into similar rectangles - Wikipedia

    en.wikipedia.org/wiki/Dividing_a_square_into...

    The fact that a rectangle of aspect ratio ρ 2 can be used for dissections of a square into similar rectangles is equivalent to an algebraic property of the number ρ 2 related to the Routh–Hurwitz theorem: all of its conjugates have positive real part.

  5. Help:Creating tables - Wikipedia

    en.wikipedia.org/wiki/Help:Creating_tables

    The row number column created by Template:Static row numbers is not counted in these calculations. Fill in the "replace with" box with: $1[[$3]]$4. Then click "Replace all". The "m" number may be different if a table uses rowspan or colspan. If you want links for the first column the following will work with both compact and long table wikitext ...

  6. Right triangle - Wikipedia

    en.wikipedia.org/wiki/Right_triangle

    A right triangle ABC with its right angle at C, hypotenuse c, and legs a and b,. A right triangle or right-angled triangle, sometimes called an orthogonal triangle or rectangular triangle, is a triangle in which two sides are perpendicular, forming a right angle (1 ⁄ 4 turn or 90 degrees).

  7. Integer partition - Wikipedia

    en.wikipedia.org/wiki/Integer_partition

    and the number of partitions of n in which all parts are 1, 2 or 3 (or, equivalently, the number of partitions of n into at most three parts) is the nearest integer to (n + 3) 2 / 12. [ 14 ] Partitions in a rectangle and Gaussian binomial coefficients

  8. Golden rectangle - Wikipedia

    en.wikipedia.org/wiki/Golden_rectangle

    In geometry, a golden rectangle is a rectangle with side lengths in golden ratio +:, or ⁠:, ⁠ with ⁠ ⁠ approximately equal to 1.618 or 89/55. Golden rectangles exhibit a special form of self-similarity : if a square is added to the long side, or removed from the short side, the result is a golden rectangle as well.

  9. TI-108 - Wikipedia

    en.wikipedia.org/wiki/TI-108

    The TI-108 is a basic handheld calculator manufactured by Texas Instruments aimed at introducing younger students to basic arithmetic and calculator functionality. [1] The TI-108 is widely used among younger students due to its low cost, durability, and simplicity.