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Chapter Eight Conics
Set of all points in a plane that are equidistant from a particular point to a particular line
the distance from the vertex to the focus
Set of all points in a plane whose distances from two fixed points (the foci) have a constant sum
Ellipse 'a' placement
always largest and under the dominant term
set of all points in a plane whose distances from two fixed points have a common difference
x^2/a^2 + y^2/b^2=1
Hyperbola 'a' placement
is fixed. direction is determined by x or y term first