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  2. Polar coordinate system - Wikipedia

    en.wikipedia.org/wiki/Polar_coordinate_system

    In green, the point with radial coordinate 3 and angular coordinate 60 degrees or (3, 60°). In blue, the point (4, 210°). In mathematics, the polar coordinate system specifies a given point in a plane by using a distance and an angle as its two coordinates. These are the point's distance from a reference point called the pole, and

  3. File:Polar graph paper.svg - Wikipedia

    en.wikipedia.org/wiki/File:Polar_graph_paper.svg

    File:Polar graph paper.svg. Add languages. Page contents not supported in other languages. File; ... 15:46, 1 October 2006: 250 × 250 (13 KB) Laurens~commonswiki

  4. Polar plotter - Wikipedia

    en.wikipedia.org/wiki/Polar_plotter

    A polar plotter also known as polargraph or Kritzler is a plotter which uses two-center bipolar coordinates to produce vector drawings using a pen suspended from strings connected to two pulleys at the top of the plotting surface. This gives it two degrees of freedom and allows it to scale to fairly large drawings simply by moving the motors ...

  5. Graph paper - Wikipedia

    en.wikipedia.org/wiki/Graph_paper

    Hexagonal paper shows regular hexagons instead of squares. These can be used to map geometric tiled or tesselated designs among other uses. Isometric graph paper or 3D graph paper is a triangular graph paper which uses a series of three guidelines forming a 60° grid of small triangles. The triangles are arranged in groups of six to make hexagons.

  6. Pole and polar - Wikipedia

    en.wikipedia.org/wiki/Pole_and_polar

    Conversely, the polar line (or polar) of a point Q in a circle C is the line L such that its closest point P to the center of the circle is the inversion of Q in C. If a point A lies on the polar line q of another point Q, then Q lies on the polar line a of A. More generally, the polars of all the points on the line q must pass through its pole Q.

  7. Archimedean spiral - Wikipedia

    en.wikipedia.org/wiki/Archimedean_spiral

    Archimedean spiral represented on a polar graph The Archimedean spiral has the property that any ray from the origin intersects successive turnings of the spiral in points with a constant separation distance (equal to 2 πb if θ is measured in radians ), hence the name "arithmetic spiral".

  8. Polar vortex makes much of US colder than Greenland, but ...

    www.aol.com/news/polar-vortex-makes-much-us...

    The polar vortex hit its peak across much of America on Wednesday, with an icy grip that made Arctic Greenland seem like a toasty vacation spot in comparison. At 34 degrees Fahrenheit (1 degree ...

  9. Radar chart - Wikipedia

    en.wikipedia.org/wiki/Radar_chart

    The radar chart is also known as web chart, spider chart, spider graph, spider web chart, star chart, [2] star plot, cobweb chart, irregular polygon, polar chart, or Kiviat diagram. [ 3 ] [ 4 ] It is equivalent to a parallel coordinates plot, with the axes arranged radially.