The elements of Euclid : viz, the first six books, together with the eleventh and twelfth : the errors, by which Theon, or others, have long ago vitiated these books, are corrected, and some of Euclid's demonstrations are restored : also, The book of Euclid's data, in like manner corrected (1834)
Euclid, Euclid, Simson, Robert, 1687-1768 · Philadelphia : Desilver & Thomas · leaf 216
Similar pyramids having triangular bases are one toanother in the triplicate ratio of that of their homolo-gous sides. Let the pyramids having the triangles ABC, DEF for theirbases, and the points G, H for their vertices, be similar, and si-milarly situated; the pyramid ABCG has to the pyramid… … N B
Mathematics, Greek · Geometry · Trigonometry
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