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  2. Overlapping circles grid - Wikipedia

    en.wikipedia.org/wiki/Overlapping_circles_grid

    An overlapping circles grid is a geometric pattern of repeating, overlapping circles of an equal radius in two-dimensional space. Commonly, designs are based on circles centered on triangles (with the simple, two circle form named vesica piscis ) or on the square lattice pattern of points.

  3. Hexafoil - Wikipedia

    en.wikipedia.org/wiki/Hexafoil

    The second circle is centered at any point on the first circle. All following circles are centered on the intersection of two other circles. The design is sometimes expanded into a regular overlapping circles grid. Bartfeld (2005) describes the construction: "This design consists of circles having a 1-[inch] radius, with each point of ...

  4. Floral diagram - Wikipedia

    en.wikipedia.org/wiki/Floral_diagram

    Floral diagram of Anagallis arvensis. [1]: 307 The dot represents the main axis, green structure below is the subtending bract.Calyx (green arcs) consists of five free sepals; corolla (red arcs) consists of five fused petals.

  5. Circle packing - Wikipedia

    en.wikipedia.org/wiki/Circle_packing

    A compact binary circle packing with the most similarly sized circles possible. [7] It is also the densest possible packing of discs with this size ratio (ratio of 0.6375559772 with packing fraction (area density) of 0.910683). [8] There are also a range of problems which permit the sizes of the circles to be non-uniform.

  6. Floral axis - Wikipedia

    en.wikipedia.org/wiki/Floral_axis

    A typical example of a floral diagram. The floral axis (receptacle) is the circle in the middle, surrounded by staminodes, petals, and sepals. The main axis is the circle at the top of the diagram [2] Floral diagramming is a method used to graphically describe a flower.

  7. Doyle spiral - Wikipedia

    en.wikipedia.org/wiki/Doyle_spiral

    A Doyle spiral of type (8,16) printed in 1911 in Popular Science as an illustration of phyllotaxis. [1] One of its spiral arms is shaded. In the mathematics of circle packing, a Doyle spiral is a pattern of non-crossing circles in the plane in which each circle is surrounded by a ring of six tangent circles.

  8. Philips circle pattern - Wikipedia

    en.wikipedia.org/wiki/Philips_circle_pattern

    Use of the Philips circle pattern was in its test card broadcasts until 17 February 2001 between 12:00 AM and 06:00 AM (the next day, bTV started 24-hour transmissions), and 2 times a year during transmitter maintenance until 2013. The Philips circle pattern was also used in Hungary, [161] Belgium, [162] [163] Norway, [164] [165] and Sweden. [166]

  9. Islamic geometric patterns - Wikipedia

    en.wikipedia.org/wiki/Islamic_geometric_patterns

    The circle symbolizes unity and diversity in nature, and many Islamic patterns are drawn starting with a circle. [16] For example, the decoration of the 15th-century mosque in Yazd , Persia is based on a circle, divided into six by six circles drawn around it, all touching at its centre and each touching its two neighbours' centres to form a ...

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