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  2. Tessellation - Wikipedia

    en.wikipedia.org/wiki/Tessellation

    Tessellation in two dimensions, also called planar tiling, is a topic in geometry that studies how shapes, known as tiles, can be arranged to fill a plane without any gaps, according to a given set of rules. These rules can be varied. Common ones are that there must be no gaps between tiles, and that no corner of one tile can lie along the edge ...

  3. Wallpaper group - Wikipedia

    en.wikipedia.org/wiki/Wallpaper_group

    A wallpaper group (or plane symmetry group or plane crystallographic group) is a mathematical classification of a two-dimensional repetitive pattern, based on the symmetries in the pattern. Such patterns occur frequently in architecture and decorative art, especially in textiles, tiles, and wallpaper. The simplest wallpaper group, Group p 1 ...

  4. Café wall illusion - Wikipedia

    en.wikipedia.org/wiki/Café_wall_illusion

    The same image, with colors of lower contrast, no longer displaying the illusion. The café wall illusion (also known as the Münsterberg illusion or the kindergarten illusion) is a geometrical-optical illusion in which the parallel straight dividing lines between staggered rows with alternating dark and light rectangles (such as bricks or ...

  5. Einstein problem - Wikipedia

    en.wikipedia.org/wiki/Einstein_problem

    Aperiodic tiling with "Tile(1,1)". The tiles are colored according to their rotational orientation modulo 60 degrees. [1] ( Smith, Myers, Kaplan, and Goodman-Strauss) In plane geometry, the einstein problem asks about the existence of a single prototile that by itself forms an aperiodic set of prototiles; that is, a shape that can tessellate space but only in a nonperiodic way.

  6. Mahjong tiles - Wikipedia

    en.wikipedia.org/wiki/Mahjong_tiles

    Mahjong tiles (Chinese: 麻將牌 or 麻雀牌; pinyin: májiàngpái; Cantonese Jyutping: maa4zoek3paai2; Japanese: 麻雀牌; rōmaji: mājanpai) are tiles of Chinese origin that are used to play mahjong as well as mahjong solitaire and other games. Although they are most commonly tiles, they may refer to playing cards with similar contents ...

  7. New York City Subway tiles - Wikipedia

    en.wikipedia.org/wiki/New_York_City_Subway_tiles

    New York City Subway tiles. Atlantic Avenue – Barclays Center station identification on the BMT Brighton Line platform. Many New York City Subway stations are decorated with colorful ceramic plaques and tile mosaics. Of these, many take the form of signs, identifying the station's location. Much of this ceramic work was in place when the ...

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Penrose tiling - Wikipedia

    en.wikipedia.org/wiki/Penrose_tiling

    Penrose tiling. A Penrose tiling is an example of an aperiodic tiling. Here, a tiling is a covering of the plane by non-overlapping polygons or other shapes, and a tiling is aperiodic if it does not contain arbitrarily large periodic regions or patches. However, despite their lack of translational symmetry, Penrose tilings may have both ...