Index Coniques
The Parabola
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This curve is called a "comparison". What does it wish to be compared with: an ellipse or a hyperbola? Whichever, it always has a nice story...

What to choose :  or ?

  1. Parabola in Cartesian co-ordinates  
    Parabolic range of fire  
    Charged particle in a uniform electric field
  2. Focus and directrix  
  3. Tangents  
    Stigmatism of a parabolic mirror
  4. Parabola in polar co-ordinates  
    Parabolic path of a comet