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Across 1. one of two points used to define an ellipse 6. the axis of symmetry of a hyperbola that seperates the two branches of the hyperbola 9. set of all points in a plane 11. one of the two symmetrical parts of the hyperbola 12. the longer axis of an ellipse 14. the endpoints of an ellpise 15. a line that is in the same plane as a circle and intersects the circle a only one point 16. a fixed point used to defina a parabola

Down 2. the endpoints of the minor axis 3. one of two points used to define a hyperbola 4. the axis of symmetry of a hyperbola that contains the vertices and foci 5. A plane curve everywhere equidistant from a given fixed point, the center. 7. a fixed line used to define a parabola 8. the shorter axis of an ellipse 10. a plane figure formed by the intersection of a double right coneand a plane 13. the set of all points in a plane such that the difference of the distances is constant