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  2. Rectilinear polygon - Wikipedia

    en.wikipedia.org/wiki/Rectilinear_polygon

    A rectilinear polygon which is not a rectangle is never convex, but it can be orthogonally convex. See Orthogonally convex rectilinear polygon. A monotone rectilinear polygon is a monotone polygon which is also rectilinear. A T-square is a fractal generated from a sequence of rectilinear polygons with interesting properties.

  3. Shape and form (visual arts) - Wikipedia

    en.wikipedia.org/wiki/Shape_and_form_(visual_arts)

    A form is an artist's way of using elements of art, principles of design, and media. Form, as an element of art, is three-dimensional and encloses space. Like a shape, a form has length and width, but it also has depth. Forms are either geometric or free-form, and can be symmetrical or asymmetrical.

  4. Polygon - Wikipedia

    en.wikipedia.org/wiki/Polygon

    The area of a self-intersecting polygon can be defined in two different ways, giving different answers: Using the formulas for simple polygons, we allow that particular regions within the polygon may have their area multiplied by a factor which we call the density of the region. For example, the central convex pentagon in the center of a ...

  5. Rectangle - Wikipedia

    en.wikipedia.org/wiki/Rectangle

    In Euclidean plane geometry, a rectangle is a rectilinear convex polygon or a quadrilateral with four right angles.It can also be defined as: an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°); or a parallelogram containing a right angle.

  6. Art gallery problem - Wikipedia

    en.wikipedia.org/wiki/Art_gallery_problem

    The question about how many vertices/watchmen/guards were needed, was posed to Chvátal by Victor Klee in 1973. [1] Chvátal proved it shortly thereafter. [2] Chvátal's proof was later simplified by Steve Fisk, via a 3-coloring argument. [3] Chvátal has a more geometrical approach, whereas Fisk uses well-known results from Graph theory.

  7. Taxicab geometry - Wikipedia

    en.wikipedia.org/wiki/Taxicab_geometry

    The taxicab distance is also sometimes known as rectilinear distance or L 1 distance (see L p space). [1] This geometry has been used in regression analysis since the 18th century, and is often referred to as LASSO. Its geometric interpretation dates to non-Euclidean geometry of the 19th century and is due to Hermann Minkowski.

  8. Polygon covering - Wikipedia

    en.wikipedia.org/wiki/Polygon_covering

    A rectilinear polygon can always be covered with a finite number of vertices of the polygon. [1] The algorithm uses a local optimization approach: it builds the covering by iteratively selecting maximal squares that are essential to the cover (i.e., contain uncovered points not covered by other maximal squares) and then deleting from the polygon the points that become unnecessary (i.e ...

  9. Rectilinear - Wikipedia

    en.wikipedia.org/wiki/Rectilinear

    Rectilinear prophecy, where a straight line can be drawn from the prophecy to the fulfillment without any branches as in the case of typological interpretations Near-rectilinear halo orbit , a highly-elliptical orbit around a Lagrangian point of a moon, that due to the moons orbital movement, will be nearly rectilinear in some frames of reference.

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