-
particular point,
called a focus, and some
particular line,
called a
directrix, are in a
fixed ratio,
called the eccentricity. The type of
conic is determined...
- a
directrix is a
curve ****ociated with a
process generating a
geometric object, such as:
Directrix (conic section)
Directrix (generatrix)
Directrix (rational...
- (the
directrix). The
focus does not lie on the
directrix. The
parabola is the
locus of
points in that
plane that are
equidistant from the
directrix and...
-
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...
-
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....
-
point (the focus) is
proportional to the
distance from a
fixed line (the
directrix), the
constant of
proportionality being called the eccentricity. A conic...
- shape. The path
directing the
motion of the
generatrix motion is
called a
directrix or dirigent. A cone can be
generated by
moving a line (the generatrix)...
-
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)...
- focus) and a
fixed line (the
directrix),
where distance from the
directrix is
measured along a line
perpendicular to the
directrix. In
shape analysis, the...
- the
directrix plane. (2) All
rulings intersect a
fixed line, the axis. The
conoid is a
right conoid if its axis is
perpendicular to its
directrix plane...
