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Risoluzione della quistione 771 (\textit{G. Cardoso-Laynes}). - MaRDI portal

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Risoluzione della quistione 771 (\textit{G. Cardoso-Laynes}). (Q1489946)

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scientific article; zbMATH DE number 2638240
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English
Risoluzione della quistione 771 (\textit{G. Cardoso-Laynes}).
scientific article; zbMATH DE number 2638240

    Statements

    Risoluzione della quistione 771 (\textit{G. Cardoso-Laynes}). (English)
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    1909
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    Man bezeichne mit \(\delta_a,\delta_b,\delta_c\) die Abstände eines Punktes \(P\) der Ebene eines Dreiecks \(ABC\) von den Seiten \(BC, CA, AB\). Der Ort von \(P\), für den \(\delta_c^2=\delta_a^2+\delta_b^2\) gilt, ist ein Kegelschnitt \(\gamma_2\), und zwar für \(C<\frac12\,\pi\) eine Hyperbel, für \(C=\frac12\,\pi\) eine Parabel, für \(C>\frac12\,\pi\) eine Ellipse. Das Dreieck \(ABC\) ist in bezug auf \(\gamma_2\) ein konjugiertes.
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