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 249
i\ / -Z= (hyp.), ), : i \ (B. 5. pr. 11.) :. (B. 5- pr- 9); ■■■■■■•. , and at the but they are on the fame bafe -■■■■■•■ifame fide of it, and •°. II (B- i.pr. 39) Q. E. D. 2l6 BOOK VI. PROP. III. THEOR. … RIGHT /ine ( ) bifeSling the angle of atriangle, divides the op-pofite Jide into fegments——™) proportional to the conterminous Jides (- )• And if a Jiraight line (- —)drawn from any angle of a triangledivide the oppojite Jide ( ■■■■■■) into fegments ( , ....■■■■..) proportional to the conterminous…
Euclid's Elements · Geometry
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