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Math
Geometry
Pre-Calculus Terms and Keynotes
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Gravity
Terms in this set (11)
Circle
The set of all points equidistant from a given fixed point.
Conic
The intersection of a plane and a right circular cone.
Conjugate Axis
The line segment related to a hyperbola of length 2b whose midpoint is the center.
Degenerate Conic
A conic which is not a parabola, ellipse, circle, or hyperbola. These include lines, intersecting lines, and points.
Directrix
For a parabola, it is the line whose distance from any point on the parabola is the same as the distance from that point to the focus.
Eccentricity
The ratio in an ellipse or hyperbola. Under the polar definition of conics, e is the constant ratio of the distance from a point to the focus and the distance from that point to the directrix.
Ellipse
The set of all points such that the sum of the distances from the point to each of two fixed points is constant.
Hyperbola
The set of all points such that the difference of the distances between each of two fixed points and any point on the conic is constant.
Major Axis
The line segment containing the foci of an ellipse whose endpoints are the vertices whose length is 2a.
Minor Axis
The line segment containing the center of an ellipse perpendicular to the major axis whose length is 2b.
Transverse Axis
The line segment that contains the center and whose endpoints are the two vertices of a hyperbola.
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