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To sketch an ellipse, we locate
?
two foci
center and radius
vertices and covertices
slope and intercepts
, then draw a smooth curve through them.
If is the major axis horizontal or vertical?
?
horizontal
vertical
The -intercepts of a central ellipse lie
?
a
b
units from the center.
An ellipse is one of the four
?
conic sections
quadrants
formulas
solutions
.