Philippe Debar wrote:

> Thank you very much Alain, your answers will be very usefull.

You're more than welcome.(Useful only takes one 'l' by the way).


> I like the inscribing rectangle idea very much...

Well, parallelepiped, not rectangle.

> Would you know if this is the only answer, or one from a set of
> solutions ?

This has to be the only one because you give two points and two
tangeants, therefore there can only be one solution.

> This is not very important, it is only idle curiosity.

That is exactly what is good : curiosity.

> Thank you again

Welcome again.

> Povingly

And same back.

> Philippe

By the way, I'm French, so if you have a problem chating in English,
mail me up in your own language ;-)I just thougth this might benefit
others, so I kept it all the way in English.

Cheers,
Al.

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