Conics

John Golden

Conic Section materials of interest.


  • 1. Parabola with Directrix, Focus, Axis of Symmetry Part 2
  • 2. Standard vs Vertex Forms
  • 3. Ellipse with Directrices, Eccentricity, and Foci Part 2
  • 4. Ellipse by String
  • 5. Construction of Ellipse
  • 6. Hyperbola with Directrices, Asymptotes, Eccen, etc. part 2
  • 7. Ellipse and Hyperbola Review
  • 8. A Cubic Solution of Omar Khayyam
  • 9. Archimedes' New and Improved Compass
  • 10. Van Schooten's Ellipse
  • 11. What-If-Not Conic Constructions #3
  • 12. Using focus and directrix
  • 13. Parabola from Four Tangents
  • 14. Matching an Ellipse
  • 15. Matching a Parabola
  • 16. Matching a Hyperbola
  • 17. Parabola as Envelope
  • 18. Ellipse as Envelope
  • 19. Hyperbola as Envelope
  • 20. Rubber Pencil Illusion
  • 21. String Art
  • 22. Curved String Art
  • 23. Tangent Chain to equal Circles
  • 24. hyperbola explorer
  • 25. Figure traced by midpoints of sliding rods
  • 26. Hyperbola Definition
  • 27. Ellipse & Hyperbola Construction by Circle
  • 28. Conics by a tangent circle
  • 29. Ellipse, Hyperbola and Circle as Envelopes
  • 30. Ellipse as Envelope
  • 31. The Inverse of a Parabola is a Cardioid

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Parabola with Directrix, Focus, Axis of Symmetry Part 2

Graph of a parabola in the form of (y-k) = 4c(x-h)^2
– dandersod

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