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  2. Quadrant (plane geometry) - Wikipedia

    en.wikipedia.org/wiki/Quadrant_(plane_geometry)

    The four quadrants of a Cartesian coordinate system The axes of a two-dimensional Cartesian system divide the plane into four infinite regions , called quadrants , each bounded by two half-axes. The axes themselves are, in general, not part of the respective quadrants.

  3. Cartesian coordinate system - Wikipedia

    en.wikipedia.org/wiki/Cartesian_coordinate_system

    The quadrants may be named or numbered in various ways, but the quadrant where all coordinates are positive is usually called the first quadrant. If the coordinates of a point are (x, y), then its distances from the X-axis and from the Y-axis are | y | and | x |, respectively; where | · | denotes the absolute value of a number.

  4. List of common coordinate transformations - Wikipedia

    en.wikipedia.org/wiki/List_of_common_coordinate...

    Let (x, y, z) be the standard Cartesian coordinates, and (ρ, θ, φ) the spherical coordinates, with θ the angle measured away from the +Z axis (as , see conventions in spherical coordinates). As φ has a range of 360° the same considerations as in polar (2 dimensional) coordinates apply whenever an arctangent of it is taken. θ has a range ...

  5. Polar coordinate system - Wikipedia

    en.wikipedia.org/wiki/Polar_coordinate_system

    In the modern terminology of differential geometry, polar coordinates provide coordinate charts for the differentiable manifold R 2 \ {(0,0)}, the plane minus the origin. In these coordinates, the Euclidean metric tensor is given by d s 2 = d r 2 + r 2 d θ 2 . {\displaystyle ds^{2}=dr^{2}+r^{2}d\theta ^{2}.}

  6. Analytic geometry - Wikipedia

    en.wikipedia.org/wiki/Analytic_geometry

    Illustration of a Cartesian coordinate plane. Four points are marked and labeled with their coordinates: (2,3) in green, (−3,1) in red, (−1.5,−2.5) in blue, and the origin (0,0) in purple. In analytic geometry, the plane is given a coordinate system, by which every point has a pair of real number coordinates.

  7. Arrest after 'terrifying' knifepoint robbery - AOL

    www.aol.com/hunt-man-terrifying-knifepoint...

    A man has been arrested after the "serious incident".

  8. Octant (solid geometry) - Wikipedia

    en.wikipedia.org/wiki/Octant_(solid_geometry)

    The horizontal plane shows the four quadrants between x- and y-axis. (Vertex numbers are little-endian balanced ternary.) An octant in solid geometry is one of the eight divisions of a Euclidean three-dimensional coordinate system defined by the signs of the coordinates. It is analogous to the two-dimensional quadrant and the one-dimensional ...

  9. 24 Easy Heart-Healthy Breakfast Recipes to Make for Busy Mornings

    www.aol.com/24-easy-heart-healthy-breakfast...

    Plane flight records of Kazakhstan crash headed to Brazil. Sports. Sports. Yahoo Sports. Grizzlies star Ja Morant out, considered ‘week-to-week’ with right shoulder injury. Sports.