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  2. Conic section - Wikipedia

    en.wikipedia.org/wiki/Conic_section

    The three types of conic section are the hyperbola, the parabola, and the ellipse; the circle is a special case of the ellipse, though it was sometimes considered a fourth type. The ancient Greek mathematicians studied conic sections, culminating around 200 BC with Apollonius of Perga 's systematic work on their properties.

  3. Menaechmus - Wikipedia

    en.wikipedia.org/wiki/Menaechmus

    Menaechmus likely discovered the conic sections, that is, the ellipse, the parabola, and the hyperbola, as a by-product of his search for the solution to the Delian problem. [3] Menaechmus knew that in a parabola y 2 = L x, where L is a constant called the latus rectum , although he was not aware of the fact that any equation in two unknowns ...

  4. Hyperbola - Wikipedia

    en.wikipedia.org/wiki/Hyperbola

    This equation is called the canonical form of a hyperbola, because any hyperbola, regardless of its orientation relative to the Cartesian axes and regardless of the location of its center, can be transformed to this form by a change of variables, giving a hyperbola that is congruent to the original (see below).

  5. Confocal conic sections - Wikipedia

    en.wikipedia.org/wiki/Confocal_conic_sections

    A parabola is the limit curve of a pencil of ellipses with a common vertex and one common focus, as the other focus is moved to infinity to the right, and also the limit curve of a pencil of hyperbolas with a common vertex and one common focus, as the other focus is moved to infinity to the left.

  6. Focal conics - Wikipedia

    en.wikipedia.org/wiki/Focal_conics

    F: focus of the red parabola and vertex of the blue parabola. In geometry, focal conics are a pair of curves consisting of [1] [2] either an ellipse and a hyperbola, where the hyperbola is contained in a plane, which is orthogonal to the plane containing the ellipse. The vertices of the hyperbola are the foci of the ellipse and its foci are the ...

  7. List of curves - Wikipedia

    en.wikipedia.org/wiki/List_of_curves

    Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... Ellipse; Parabola; Hyperbola. Unit hyperbola; Degree 3. Cubic plane curves include

  8. Eccentricity (mathematics) - Wikipedia

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

    A family of conic sections of varying eccentricity share a focus point and directrix line, including an ellipse (red, e = 1/2), a parabola (green, e = 1), and a hyperbola (blue, e = 2). The conic of eccentricity 0 in this figure is an infinitesimal circle centered at the focus, and the conic of eccentricity ∞ is an infinitesimally separated ...

  9. Triangle conic - Wikipedia

    en.wikipedia.org/wiki/Triangle_conic

    Kiepert hyperbola of ABC. The hyperbola passes through the vertices A, B, C, the orthocenter (O) and the centroid (G) of the triangle. 2: Jerabek hyperbola: The conic which passes through the vertices, the orthocenter and the circumcenter of the triangle of reference is known as the Jerabek hyperbola. It is always a rectangular hyperbola.

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