How to get the intersection of a locus and a line ?

venturikites shared this question 1 week ago
Answered

I am trying to create the intersection of a locus and a line...see attached file.

Somehow it seems inpossible to do so...strange because it is however possible to put a point on a locus.

I have also tried to add the command " LocusEquation " but all I get is an error " unknown command".

There is something I am doing wrong, but I cannot figure out what.

Would you please have a look at my file and let me know how to get the intersection of the green locus and the red line ?


Thanks in advance.

Comments (6)

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You get the "Unknown command" as output of a LocusEquation() command when it's not possible to determine the equation of the locus. See https://wiki.geogebra.org/e...

For the same reason I guess that it's currently not possible to get intersections.

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Anyway, in ancient times ;) Zbynek suggested a cool workaround.

See https://help.geogebra.org/t...

I'm attaching your file where I've created the objects defined in the linked post.

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une autre approximation (distance <0.01)


Element(First(loc1, Length(loc1)),IndexOf(true,Zip(Distance(M, f) < 0.01, M, First(loc1, Length(loc1)))))

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??????????? !!!!!!!


après sauvegarde le point "Test" devient non défini ?


ressaisir le code redonne bien la réponse

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traitement sans lieu dans le cas particulier de la construction

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A solution with Spline()

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