The first six books of the elements of Euclid, in which coloured diagrams and symbols are used instead of letters for the greater ease of learners (1847)
Byrne, Oliver, Whittingham, Charles, 1795-1876, Chiswick Press · London : William Pickering · leaf 286
(B. I. pr. 31). Since P.. ^ are about the fame and have diagonal ^^^^^^^^ , ana nave jmm common,they are fimilar (B. 6. pr. 24); but - (hyp.). and .*. (B. 5. pr. 9.), which is abfurd. 3 is not the diagonal ofin the fame manner it can be demonftrated that no otherline is except :. Q. E. D. 254 BOOK…
Euclid's Elements · Geometry
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