Conic sections

Jonathan Holland, 6/4/2018


  • 1. Eccentricity and directrix of an ellipse
  • 2. Construction of an ellipse
  • 3. Ellipse
  • 4. Steiner construction
  • 5. Conic sections
  • 6. Constant sum to two foci
  • 7. Focus-directrix property
  • 8. Construction of ellipse, second method
  • 9. Pedal-Point construction of the conics
  • 10. Pedal-Point construction of a parabola
  • 11. Foci of an ellipse
  • 12. Section 10.5-Hyperbola

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Eccentricity and directrix of an ellipse

– Jonathan Holland

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