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Topic: construction of triangle of given perimeter, given point and angle
Replies: 16   Last Post: Jun 10, 2011 12:58 PM

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Jon Roberts

Posts: 47
Registered: 12/6/04
Re: parabola through 4 points
Posted: Dec 5, 1997 5:52 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply



I received this in my email this week. It explores, draws together and resolves some
of the issues raised in this discussion group under the above thread.


Subject: parabole et 4 points
Date: Wed, 03 Dec 1997 15:43:34 +0100
From: Bernard Geneves <Bernard.Geneves@imag.fr>
To: cabri-forum@imag.fr



Synthèse des réponses reçues :
en général, par quatre points, il passe deux paraboles.

le site d'AbraCadabri contient toute une chronique consacrée à cette
question,
HREF="http://www-cabri.imag.fr/abracadabri/RubConiques/Projectif/ProjectifGene.html"

Paraboles passant par 4 points</A>avec une approche expérimentale,
suivie d'une construction des paraboles due à Michel Guillerault
(Michel.Guillerault@imag.fr).

Bernard Geneves
Projet IMAG Cabri-geometre Fax : +33 (0)4 7657 5057
Laboratoire Leibniz - IMAG
46 avenue Felix Viallet Tel : +33 (0)4 7657 5056
38000 Grenoble FRANCE Adel: Bernard.Geneves@imag.fr

Centre National de la Recherche Scientifique
Institut National Polytechnique de Grenoble Universite Joseph Fourier
___________________________________________________________________________

I found the exposition very helpful, especially in achieving what I had originally
set out to do: Draw a complete parabola from its intercepts.

Regards,

Jon Roberts.






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