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A conic is the curve obtained as the intersection of a plane, called the cutting plane, with the surface of a double cone (a cone with two nappes).It is usually assumed that the cone is a right circular cone for the purpose of easy description, but this is not required; any double cone with some circular cross-section will suffice.
Download as PDF; Printable version; In other projects Wikimedia Commons; ... Pages in category "Conic sections" The following 51 pages are in this category, out of 51 ...
On conic sections, ruled surfaces and other manifestations of the hyperbola 1977 Oct: On playing New Eleusis, the game that simulates the search for truth 1977 Nov: In which joining sets of points by lines leads into diverse (and diverting) paths 1977 Dec: Dr. Matrix goes to California to apply punk to rock study 1978 Jan
In Euclidean geometry, a circumconic is a conic section that passes through the three vertices of a triangle, [1] and an inconic is a conic section inscribed in the sides, possibly extended, of a triangle. [2] Suppose A, B, C are distinct non-collinear points, and let ABC denote the triangle whose vertices are A, B, C.
More generally, when the directrix is an ellipse, or any conic section, and the apex is an arbitrary point not on the plane of , one obtains an elliptic cone [4] (also called a conical quadric or quadratic cone), [5] which is a special case of a quadric surface.
In geometry, the conic constant (or Schwarzschild constant, [1] after Karl Schwarzschild) is a quantity describing conic sections, and is represented by the letter K. The constant is given by K = − e 2 , {\displaystyle K=-e^{2},} where e is the eccentricity of the conic section.
6 points on the sides of triangle and their common conic section. Carnot's theorem (named after Lazare Carnot) describes a relation between conic sections and triangles.. In a triangle with points , on the side , , on the side and , on the side those six points are located on a common conic section if and only if the following equation holds:
In algebraic geometry, the conic sections in the projective plane form a linear system of dimension five, as one sees by counting the constants in the degree two equations. The condition to pass through a given point P imposes a single linear condition, so that conics C through P form a linear system of dimension 4.