"Curvers of second degree, or conics, are traditionally viewed as objects pertaining to analytic geometry and are studied in lower-level courses in engineering colleges. At best, only the optical properties of conics are mentioned among their geometric properties. But those curves also possess a number of other nice properties, a majority of which can be established by methods of elementary geometry well within the reach of high school students. Moreover, conics help solve some geometric problems seemingly unrelated to conics. In this book the reader will find the most interesting about curves of order two, including those proved recently."
PAGINA WEB PARA BAIXAR O LIVRO :http://geometry.ru/books/conic_e.pdf
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