Conic Sections - Extra Credit

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Across
  1. 2. All the points equidistant from a focus and a directrix
  2. 5. Segment of greatest length across an ellipse (2 words)
  3. 7. Direction a parabola opens when equation is in "x=" and "a" is negative
  4. 11. A curve obtained from the intersection of a plane and a cone (2 words)
  5. 12. The line passing through the center and both vertices of a hyperbola (2 words)
  6. 14. Direction in which "a" is always oriented
  7. 16. Mr. Cisneros' favorite NFL team
  8. 18. Line that runs perpendicular to a parabola's axis of symmetry
  9. 20. Conic section formed when a cone is cut by plane parallel to its base
  10. 21. (h,k) in a circle or ellipse
Down
  1. 1. Direction a parabola opens when equation is in "y=" and "a" is positive
  2. 3. Hyperbolas have these that they never touch
  3. 4. Direction in which "b" is always oriented
  4. 6. Slices a parabola in half (3 words)
  5. 8. Only one variable is this in a parabola
  6. 9. Only conic section that uses subtraction between "x" and "y" in standard equation
  7. 10. Types of numbers used to make the quilts around the room
  8. 13. Ellipses have two of these
  9. 15. Hyperbolas have two of these
  10. 17. Conic section formed by cutting through a cone at an angle
  11. 19. Number of lines of symmetry in a circle