11 terms

conic section

the intersection of a plane with one or both nappes of a double cone

circle

the locus of points in a plane that are equidistant from one point, called the center

ellipse

the locus of points in a plane such that the sum of the distances from any point in the locus to two points, called the foci, is a constant

hyperbola

the locus of points in a plane such that the difference of the distances to the two fixed points called the foci is a constsnt

parabola

the locus of points in a plane that are equidistant from a line and a point not on the line

major axis

the line through the vertices of an ellipse

transverse axis

the line joining the two vertices of a hyperbola

directix

the line, along with a point not on the line, which is used to generate a parabola

eccentricity

a measure of how close an ellipse is to being circular

asymptote

one of two lines through the center of a hyperbola that the hyperbola approaches but never intersects

focus

one of two points such that the difference of the distances from any point on the hyperbola to the foci is a constant