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  2. Four-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Four-dimensional_space

    Four-dimensional space (4D) is the mathematical extension of the concept of three-dimensional space (3D). Three-dimensional space is the simplest possible abstraction of the observation that one needs only three numbers, called dimensions, to describe the sizes or locations of objects in the everyday world.

  3. Three-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Three-dimensional_space

    Three-dimensional space. A representation of a three-dimensional Cartesian coordinate system with the x -axis pointing towards the observer. In geometry, a three-dimensional space (3D space, 3-space or, rarely, tri-dimensional space) is a mathematical space in which three values (coordinates) are required to determine the position of a point.

  4. Axonometric projection - Wikipedia

    en.wikipedia.org/wiki/Axonometric_projection

    Isometry means "equal measures" because the same scale is used for height, width, and depth". [ 9 ] From the middle of the 19th century, according to Jan Krikke (2006) [ 9 ] isometry became an "invaluable tool for engineers, and soon thereafter axonometry and isometry were incorporated in the curriculum of architectural training courses in ...

  5. Parallel projection - Wikipedia

    en.wikipedia.org/wiki/Parallel_projection

    Isometry means "equal measures" because the same scale is used for height, width, and depth". [ 9 ] From the middle of the 19th century, according to Jan Krikke (2006) [ 9 ] isometry became an "invaluable tool for engineers, and soon thereafter axonometry and isometry were incorporated in the curriculum of architectural training courses in ...

  6. Ship measurements - Wikipedia

    en.wikipedia.org/wiki/Ship_measurements

    Definitions. Beam – A measure of the width of the ship. There are two types: Beam, Overall (BOA), commonly referred to simply as Beam – The overall width of the ship measured at the widest point of the nominal waterline. Beam on Centerline (BOC) – Used for multihull vessels. The BOC for vessels is measured as follows: For a catamaran: the ...

  7. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    depth, deep, down: Defines the depth of a feature. ⌀ [2] diameter: Diameter of a circle. In a feature control frame , the ⌀ symbol tells you that the tolerance zone for the geometric tolerance is cylindrical. Abbreviations for "diameter" include ⌀, DIA, and D. D: diameter; delta: Abbreviations for "diameter" include ⌀, DIA, and D.

  8. Isometric projection - Wikipedia

    en.wikipedia.org/wiki/Isometric_projection

    Graphical projection. Isometric projection is a method for visually representing three-dimensional objects in two dimensions in technical and engineering drawings. It is an axonometric projection in which the three coordinate axes appear equally foreshortened and the angle between any two of them is 120 degrees.

  9. Hydraulic jumps in rectangular channels - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_Jumps_in...

    The height of the hydraulic jump, similar to length, is useful to know when designing waterway structures like settling basins or spillways. The height of the hydraulic jump is simply the difference in flow depths prior to and after the hydraulic jump. The height can be determined using the Froude number and upstream energy. Equations: