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  2. Spiral - Wikipedia

    en.wikipedia.org/wiki/Spiral

    The name logarithmic spiral is due to the equation = ⁡. Approximations of this are found in nature. Spirals which do not fit into this scheme of the first 5 examples: A Cornu spiral has two asymptotic points. The spiral of Theodorus is a polygon.

  3. List of spirals - Wikipedia

    en.wikipedia.org/wiki/List_of_spirals

    For <, spiral-ring pattern; =, regular spiral; >, loose spiral. R is the distance of spiral starting point (0, R) to the center. R is the distance of spiral starting point (0, R) to the center. The calculated x and y have to be rotated backward by ( − θ {\displaystyle -\theta } ) for plotting.

  4. Archimedean spiral - Wikipedia

    en.wikipedia.org/wiki/Archimedean_spiral

    The Archimedean spiral (also known as Archimedes' spiral, the arithmetic spiral) is a spiral named after the 3rd-century BC Greek mathematician Archimedes. The term Archimedean spiral is sometimes used to refer to the more general class of spirals of this type (see below), in contrast to Archimedes' spiral (the specific arithmetic spiral of ...

  5. Logarithmic spiral - Wikipedia

    en.wikipedia.org/wiki/Logarithmic_spiral

    Logarithmic spiral bevel gears are a type of spiral bevel gear whose gear tooth centerline is a logarithmic spiral. A logarithmic spiral has the advantage of providing equal angles between the tooth centerline and the radial lines, which gives the meshing transmission more stability.

  6. Sinusoidal spiral - Wikipedia

    en.wikipedia.org/wiki/Sinusoidal_spiral

    In algebraic geometry, the sinusoidal spirals are a family of curves defined by the equation in polar coordinates r n = a n cos ⁡ ( n θ ) {\displaystyle r^{n}=a^{n}\cos(n\theta )\,} where a is a nonzero constant and n is a rational number other than 0.

  7. List of curves - Wikipedia

    en.wikipedia.org/wiki/List_of_curves

    Hemihelix, a quasi-helical shape characterized by multiple tendril perversions Tendril perversion (a transition between back-to-back helices) Seiffert's spiral [4]

  8. List of mathematical shapes - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_shapes

    Table of Shapes Section Sub-Section Sup-Section Name Algebraic Curves ¿ Curves ¿ Curves: Cubic Plane Curve: Quartic Plane Curve: Rational Curves: Degree 2: Conic Section(s) Unit Circle: Unit Hyperbola: Degree 3: Folium of Descartes: Cissoid of Diocles: Conchoid of de Sluze: Right Strophoid: Semicubical Parabola: Serpentine Curve: Trident ...

  9. Fermat's spiral - Wikipedia

    en.wikipedia.org/wiki/Fermat's_spiral

    The representation of the Fermat spiral in polar coordinates (r, φ) is given by the equation = for φ ≥ 0. The parameter is a scaling factor affecting the size of the spiral but not its shape. The two choices of sign give the two branches of the spiral, which meet smoothly at the origin.

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