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 197
^X … E N as also of CD and DZ; therefore as the base FK to the base XR,so is the altitude of the solid DZ to the altitude of the solid BT:wherefore the bases of the solids BT, DZ are reciprocally propor-tional to their altitudes^ and their insisting straight lines are atright angles to the basesj…
Mathematics, Greek · Geometry · Trigonometry
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
