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  2. Dividing a square into similar rectangles - Wikipedia

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

    However, there are three distinct ways of partitioning a square into three similar rectangles: [1] [2] The trivial solution given by three congruent rectangles with aspect ratio 3:1. The solution in which two of the three rectangles are congruent and the third one has twice the side length of the other two, where the rectangles have aspect ...

  3. Spreadsheet - Wikipedia

    en.wikipedia.org/wiki/Spreadsheet

    In 2006 Google launched a beta release spreadsheet web application, this is currently known as Google Sheets and one of the applications provided in Google Drive. [16] A spreadsheet consists of a table of cells arranged into rows and columns and referred to by the X and Y locations. X locations, the columns, are normally represented by letters ...

  4. Google Sheets - Wikipedia

    en.wikipedia.org/wiki/Google_Sheets

    Google Sheets is a spreadsheet application and part of the free, web-based Google Docs Editors suite offered by Google. Google Sheets is available as a web application; a mobile app for: Android, iOS, and as a desktop application on Google's ChromeOS. The app is compatible with Microsoft Excel file formats. [5]

  5. Polygon partition - Wikipedia

    en.wikipedia.org/wiki/Polygon_partition

    In geometry, a partition of a polygon is a set of primitive units (e.g. squares), which do not overlap and whose union equals the polygon. A polygon partition problem is a problem of finding a partition which is minimal in some sense, for example a partition with a smallest number of units or with units of smallest total side-length.

  6. Klein four-group - Wikipedia

    en.wikipedia.org/wiki/Klein_four-group

    V is the symmetry group of this cross: flipping it horizontally (a) or vertically (b) or both (ab) leaves it unchanged.A quarter-turn changes it. In two dimensions, the Klein four-group is the symmetry group of a rhombus and of rectangles that are not squares, the four elements being the identity, the vertical reflection, the horizontal reflection, and a 180° rotation.

  7. Equidissection - Wikipedia

    en.wikipedia.org/wiki/Equidissection

    A 6-equidissection of a square. In geometry, an equidissection is a partition of a polygon into triangles of equal area. The study of equidissections began in the late 1960s with Monsky's theorem, which states that a square cannot be equidissected into an odd number of triangles. [1] In fact, most polygons cannot be equidissected at all. [2]

  8. Monsky's theorem - Wikipedia

    en.wikipedia.org/wiki/Monsky's_theorem

    A square can be divided into an even number of triangles of equal area (left), but into an odd number of only approximately equal area triangles (right). Monsky's proof combines combinatorial and algebraic techniques and in outline is as follows: Take the square to be the unit square with vertices at (0, 0), (0, 1), (1, 0) and (1, 1).

  9. Squaring the square - Wikipedia

    en.wikipedia.org/wiki/Squaring_the_square

    The smallest square s 1 in R is surrounded by larger, and therefore higher, cubes. Hence the upper face of the cube on s 1 is divided into a perfect squared square by the cubes which rest on it. Let s 2 be the smallest square in this dissection. By the claim above, this is surrounded on all 4 sides by squares which are larger than s 2 and ...