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  2. Origin (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Origin_(mathematics)

    The origin divides each of these axes into two halves, a positive and a negative semiaxis. [2] Points can then be located with reference to the origin by giving their numerical coordinates—that is, the positions of their projections along each axis, either in the positive or negative direction. The coordinates of the origin are always all ...

  3. Position (geometry) - Wikipedia

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

    In geometry, a position or position vector, also known as location vector or radius vector, is a Euclidean vector that represents a point P in space. Its length represents the distance in relation to an arbitrary reference origin O , and its direction represents the angular orientation with respect to given reference axes.

  4. Cartesian coordinate system - Wikipedia

    en.wikipedia.org/wiki/Cartesian_coordinate_system

    The first and second coordinates are called the abscissa and the ordinate of P, respectively; and the point where the axes meet is called the origin of the coordinate system. The coordinates are usually written as two numbers in parentheses, in that order, separated by a comma, as in (3, −10.5).

  5. Glossary of geography terms (A–M) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_geography_terms...

    Also amphidrome and tidal node. A geographical location where there is little or no tide, i.e. where the tidal amplitude is zero or nearly zero because the height of sea level does not change appreciably over time (meaning there is no high tide or low tide), and around which a tidal crest circulates once per tidal period (approximately every 12 hours). Tidal amplitude increases, though not ...

  6. Coordinate system - Wikipedia

    en.wikipedia.org/wiki/Coordinate_system

    For example, in 1D, if the mapping is a translation of 3 to the right, the first moves the origin from 0 to 3, so that the coordinate of each point becomes 3 less, while the second moves the origin from 0 to −3, so that the coordinate of each point becomes 3 more.

  7. List of country-name etymologies - Wikipedia

    en.wikipedia.org/wiki/List_of_country-name...

    The Romans were said to have called all the Greeks after the name of the first group they met, [citation needed] although the location of that tribe varies between Epirus – Aristotle recorded that the Illyrians used the name for Dorian Epiriots from their native name Graii [219] [220] – and Cumae – Eusebius of Caesarea dated its ...

  8. Chess - Wikipedia

    en.wikipedia.org/wiki/Chess

    Pawns are placed on each square of the second rank. Black's position mirrors White's, with equivalent pieces on every file. [2] The board is oriented so that the right-hand corner nearest each player is a light square; as a result the white queen always starts on a light square, while the black queen starts on a dark square.

  9. Glossary of geography terms (N–Z) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_geography_terms...

    The average height of the high waters of the neap tides occurring at a particular location is called neap high water or high water neaps, and that of the corresponding low waters is called neap low water or low water neaps. [2] Compare spring tide. nearshore The part of a beach between the shoreline and the line at which the waves break. [2 ...