Index Conics
The Hyperbola
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This curve draws us towards the infinite and does it at the double; all the better to escape from us. It deserves its name, which means "excess".

What to choose :  or ?

  1. Hyperbola in Cartesian coordinates  
  2. Foci  
  3. construction using pencil and string  
  4. Construction using foci and a directing circle  
  5. Tangents  
    Stigmatism of a hyperbolic mirror
  6. Hyperbola in polar coordinates  
    Trajectory of the planets  
    Hyperbolic movement 
    Rutherford's experiment