Conic Sections Definition of the Conic Sections
Let e > 0 (called the eccentricity) and let
F be a point (called
the Focus) in the plane and let l be a fixed line (called the
directrix). Then a conic is the set of points,
P, such that
Where PF is the distance from the point to the focus and d(Pl) is the distance
from the point to the line.. We have the following classification:
The Circumference of an Ellipse
Find the circumference of the ellipse and doubling it gives 31.74
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