A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 63
esponding to the one which is11 in the given triangle, 8. Ex. 2. Construct two triangles with equal angles, and then com-pare the sides, and see whetheryou can make two triangles whoseangles shall be respectively equal,and their sides not be propor-tional. SuG.—Having the triangle ABC, makeDEF… … FiG. 75. ABOUT SIMILAR FIGURES, ESPEOTATJiY TRIANGLES. 43 gons with AC, because it is opposite angle E, which equals B. For a simi-lar reason. EF is homologous with AB. Now, taking two sides of ABC, as BCand AB, and a side of DEF homologous with one of them, as DE, and finding afourth proportional…
Geometry · Trigonometry
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