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  2. Triangular prism - Wikipedia

    en.wikipedia.org/wiki/Triangular_prism

    In geometry, a triangular prism or trigonal prism [1] is a prism with 2 triangular bases. If the edges pair with each triangle's vertex and if they are perpendicular to the base, it is a right triangular prism. A right triangular prism may be both semiregular and uniform. The triangular prism can be used in constructing another polyhedron.

  3. Types of mesh - Wikipedia

    en.wikipedia.org/wiki/Types_of_mesh

    The possible element choices are quadrilateral in 2D and hexahedra in 3D. This model is highly space efficient, since the neighbourhood relationships are defined by storage arrangement. Some other advantages of structured grid over unstructured are better convergence and higher resolution. [3] [4] [5]

  4. Skew lines - Wikipedia

    en.wikipedia.org/wiki/Skew_lines

    In three-dimensional geometry, skew lines are two lines that do not intersect and are not parallel. A simple example of a pair of skew lines is the pair of lines through opposite edges of a regular tetrahedron. Two lines that both lie in the same plane must either cross each other or be parallel, so skew lines can exist only in three or more ...

  5. Electrical grid - Wikipedia

    en.wikipedia.org/wiki/Electrical_grid

    Although electrical grids are widespread, as of 2016, 1.4 billion people worldwide were not connected to an electricity grid. [1] As electrification increases, the number of people with access to grid electricity is growing. About 840 million people (mostly in Africa), which is ca. 11% of the World's population, had no access to grid ...

  6. Wedge prism - Wikipedia

    en.wikipedia.org/wiki/Wedge_prism

    In this type of sampling, the prism is held a comfortable distance away from the eye with the bottom edge parallel to the ground, and trees are sighted through the prism approximately 4.5 ft. above the ground. A tree is an "in" tree if the offset section of the tree overlaps the bole as viewed without the prism (Figure 1).

  7. Grid (spatial index) - Wikipedia

    en.wikipedia.org/wiki/Grid_(spatial_index)

    In the context of a spatial index, a grid or mesh is a regular [citation needed] tessellation of a manifold or 2-D surface that divides it into a series of contiguous cells, which can then be assigned unique identifiers and used for spatial indexing purposes.

  8. Grid (graphic design) - Wikipedia

    en.wikipedia.org/wiki/Grid_(graphic_design)

    A grid applied within an image (instead of a page) using additional angular lines to guide proportions. In graphic design, a grid is a structure (usually two-dimensional) made up of a series of intersecting straight (vertical, horizontal, and angular) or curved lines (grid lines) used to structure content. The grid serves as an armature or ...

  9. Universal Transverse Mercator coordinate system - Wikipedia

    en.wikipedia.org/wiki/Universal_Transverse...

    The Universal Transverse Mercator (UTM) is a map projection system for assigning coordinates to locations on the surface of the Earth.Like the traditional method of latitude and longitude, it is a horizontal position representation, which means it ignores altitude and treats the earth surface as a perfect ellipsoid.

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