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  2. Shear mapping - Wikipedia

    en.wikipedia.org/wiki/Shear_mapping

    The vertical shear displaces points to the right of the y-axis up or down, depending on the sign of m. It leaves vertical lines invariant, but tilts all other lines about the point where they meet the y-axis. Horizontal lines, in particular, get tilted by the shear angle to become lines with slope m.

  3. List of national flags by design - Wikipedia

    en.wikipedia.org/wiki/List_of_national_flags_by...

    The following flags have a distinctive aspect ratio: Belgium: Aspect ratio of 13:15. El Salvador: Aspect ratio of 189:335. Monaco: Aspect ratio of 4:5. Nepal: The only national flag that is not rectangular, being made with 5 sides, and the only one that is higher than wide. Bordering aspect ratio of ~ 6:5.

  4. Rule of thirds - Wikipedia

    en.wikipedia.org/wiki/Rule_of_thirds

    The tree is at the intersection of two lines, sometimes called a power point[ 1] or a crash point. [ 2] The rule of thirds is a "rule of thumb" for composing visual images such as designs, films, paintings, and photographs. [ 3] The guideline proposes that an image should be imagined as divided into nine equal parts by two equally spaced ...

  5. Moiré pattern - Wikipedia

    en.wikipedia.org/wiki/Moiré_pattern

    Consider two patterns made of parallel and equidistant lines, e.g., vertical lines. The step of the first pattern is p, the step of the second is p + δp, with 0 < δp < p. If the lines of the patterns are superimposed at the left of the figure, the shift between the lines increases when going to the right.

  6. Stadia mark - Wikipedia

    en.wikipedia.org/wiki/Stadia_mark

    For example, a typical stadia mark pair are set so that the ratio is 100. If one observes a vertical length on a stadia rod, rule or levelling rod with the telescope and sees that the rod spans 0.500 m between the marks (the stadia interval), then the horizontal distance from the instrument to the rod is: 0.500m x 100 = 50 m.

  7. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    3. Between two groups, may mean that the first one is a proper subgroup of the second one. > (greater-than sign) 1. Strict inequality between two numbers; means and is read as "greater than". 2. Commonly used for denoting any strict order. 3. Between two groups, may mean that the second one is a proper subgroup of the first one. ≤ 1.

  8. Typographic alignment - Wikipedia

    en.wikipedia.org/wiki/Typographic_alignment

    Typographic alignment. In typesetting and page layout, alignment or range is the setting of text flow or image placement relative to a page, column (measure), table cell, or tab (and often to an image above it or under it). The type alignment setting is sometimes referred to as text alignment, text justification, or type justification.

  9. Two-barred cross - Wikipedia

    en.wikipedia.org/wiki/Two-barred_cross

    An outlined balanced cross (equal length outlined bars on equal distances) is used on coat of arms shields and order medals. [6] In Slovakia, the flag, the coat of arms and several municipal symbols include a double cross, where graded bars are more common than equally long bars, and balanced distances along the vertical line are more common. [7]