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 59
( and Case II. … tf) Let y), and a fideof the one equal to afde ofthe other fmilarly placedwith refpeSl to the equalangles, the remaining fdesand angles are refpeSlivelyequal to one another. CASE I.and I which lie between the equal angles be equal,then -^—— ^ ^^—■••• For if it be poflible, let one of them -igreater…
Euclid's Elements · Geometry
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