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- Der Sekantensatz besagt: Schneiden sich zwei Sekanten außerhalb des Kreises in einem Punkt , so ist das Produkt der Abschnittslängen vom Sekantenschnittpunkt bis zu den beiden Schnittpunkten von Kreis und Sekante auf beiden Sekanten gleich groß. Kürzer: Das Produkt der Sekantenabschnitte ist konstant. (de)
- The intersecting secant theorem or just secant theorem describes the relation of line segments created by two intersecting secants and the associated circle. For two lines AD and BC that intersect each other in P and some circle in A and D respective B and C the following equation holds: The theorem follows directly from the fact, that the triangles PAC and PBD are similar. They share and as they are inscribed angles over AB. The similarity yields an equation for ratios which is equivalent to the equation of the theorem given above: Next to the intersecting chords theorem and the tangent-secant theorem the intersecting secants theorem represents one of the three basic cases of a more general theorem about two intersecting lines and a circle - the power of point theorem. (en)
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- Der Sekantensatz besagt: Schneiden sich zwei Sekanten außerhalb des Kreises in einem Punkt , so ist das Produkt der Abschnittslängen vom Sekantenschnittpunkt bis zu den beiden Schnittpunkten von Kreis und Sekante auf beiden Sekanten gleich groß. Kürzer: Das Produkt der Sekantenabschnitte ist konstant. (de)
- The intersecting secant theorem or just secant theorem describes the relation of line segments created by two intersecting secants and the associated circle. For two lines AD and BC that intersect each other in P and some circle in A and D respective B and C the following equation holds: The theorem follows directly from the fact, that the triangles PAC and PBD are similar. They share and as they are inscribed angles over AB. The similarity yields an equation for ratios which is equivalent to the equation of the theorem given above: (en)
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- Sekantensatz (de)
- Teorema de las secantes (es)
- Intersecting secants theorem (en)
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