George Salmon. Project to infinity the line in which AB, Aa#39;Ba#39;, aamp;c., intersect; then the theorem becomes: a If two triangles abc, aa#39;l/ca#39; have the sides of the one respectively parallel to the sides of the other, then the lines aaa#39;, bba#39;, cca#39; meet in a point.

Title | : | A Treatise on Conic Sections, containing an account of some of the most important modern algebraic and geometric methods. Second edition ... enlarged |

Author | : | George Salmon |

Publisher | : | - 1863 |

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