directrix's Usage Examples:

particular point, called a focus, and some particular line, called a directrix, are in a fixed ratio, called the eccentricity.

circular directrix.

For the ellipse, both the focus and the center of the directrix circle have finite coordinates and the radius of the directrix circle.

directrix).

The focus does not lie on the directrix.

The parabola is the locus of points in that plane that are equidistant from both the directrix and.

— the apex or vertex — and any point of some fixed space curve — the directrix — that does not contain the apex.

is uniquely determined by the rational normal scroll and is called the directrix of the scroll.

focus) and a fixed line (the directrix), where distance from the directrix is measured along a line perpendicular to the directrix.

The path directing the motion of the generatrix motion is called a directrix or dirigent.

the directrix plane.

The conoid is a right conoid, if its axis is perpendicular to its directrix plane.

lateral surface of a cylinder or cone, a conical surface with elliptical directrix, the right conoid, the helicoid, and the tangent developable of a smooth.

a directrix is a curve associated with a process generating a geometric object, such as: Directrix (conic section) Directrix (generatrix) Directrix (rational.

ellipse called the directrix: for all points on the ellipse, the ratio between the distance to the focus and the distance to the directrix is a constant.

the directrix.

Conversely, two tangents which intersect on the directrix are perpendicular.

This implies that, seen from any point on its directrix, any.

circular directrix related to F 1 {\displaystyle F_{1}} .

This property should not be confused with the definition of a hyperbola with help of a directrix (line).

point (the focus) is proportional to the distance from a fixed line (the directrix), the constant of proportionality being called the eccentricity.

surface, directrix is a line, the axis of the cylinder) torus (pipe surface, directrix is a circle), right circular cone (canal surface, directrix is a line.

The first one uses an ellipse as directrix, the second one a hyperbola: In the x-y-plane the directrix is the ellipse with equation x 2 a 2 + y.

Thioscelis directrix is a moth in the family Depressariidae.

perimeter of the base of a cone is called the "directrix", and each of the line segments between the directrix and apex is a "generatrix" or "generating line".

The broken line is the directrix of the surface; the parallel lines are its generators (or elements).