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  2. Hatch mark - Wikipedia

    en.wikipedia.org/wiki/Hatch_mark

    Graphed points — as on a graph; Hatch marks are frequently used as an abbreviation of some common units of measurement. In regard to distance, a single hatch mark indicates feet, and two hatch marks indicate inches. In regard to time, a single hatch mark indicates minutes, and two hatch marks indicate seconds.

  3. History of geometry - Wikipedia

    en.wikipedia.org/wiki/History_of_geometry

    Geometry was revolutionized by Euclid, who introduced mathematical rigor and the axiomatic method still in use today. His book, The Elements is widely considered the most influential textbook of all time, and was known to all educated people in the West until the middle of the 20th century. [1]

  4. Time point - Wikipedia

    en.wikipedia.org/wiki/Time_point

    In music a time point or timepoint (point in time) is "an instant, analogous to a geometrical point in space". [1] Because it has no duration, it literally cannot be heard, [2] but it may be used to represent "the point of initiation of a single pitch, the repetition of a pitch, or a pitch simultaneity", [3] therefore the beginning of a sound, rather than its duration.

  5. Geometry - Wikipedia

    en.wikipedia.org/wiki/Geometry

    Around 300 BC, geometry was revolutionized by Euclid, whose Elements, widely considered the most successful and influential textbook of all time, [16] introduced mathematical rigor through the axiomatic method and is the earliest example of the format still used in mathematics today, that of definition, axiom, theorem, and proof.

  6. Point (geometry) - Wikipedia

    en.wikipedia.org/wiki/Point_(geometry)

    In geometry, a point is an abstract idealization of an exact position, without size, in physical space, [1] or its generalization to other kinds of mathematical spaces.As zero-dimensional objects, points are usually taken to be the fundamental indivisible elements comprising the space, of which one-dimensional curves, two-dimensional surfaces, and higher-dimensional objects consist; conversely ...

  7. Time - Wikipedia

    en.wikipedia.org/wiki/Time

    Time is the continuous progression of our changing existence that occurs in an apparently irreversible succession from the past, through the present, and into the future. [1] [2] [3] It is a component quantity of various measurements used to sequence events, to compare the duration of events (or the intervals between them), and to quantify rates of change of quantities in material reality or ...

  8. Timeline of geometry - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_geometry

    1870 – Felix Klein constructs an analytic geometry for Lobachevski's geometry thereby establishing its self-consistency and the logical independence of Euclid's fifth postulate, 1873 – Charles Hermite proves that e is transcendental, 1878 – Charles Hermite solves the general quintic equation by means of elliptic and modular functions

  9. Coordinate system - Wikipedia

    en.wikipedia.org/wiki/Coordinate_system

    In this system, an arbitrary point O (the origin) is chosen on a given line. The coordinate of a point P is defined as the signed distance from O to P, where the signed distance is the distance taken as positive or negative depending on which side of the line P lies. Each point is given a unique coordinate and each real number is the coordinate ...

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