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 43
Becaufe _ = ..^... (confl.)and ^^^— common to the two triangles and (conft.). 4 = (pr. 8.) Q. E. D. 10 BOOK I. PROP. X. PROB. O i>tye^ a given finite Jlraight line [f^^^mmmmwm^. … and common to the two triangles. Therefore the given line is bifefted. Q;E. D. BOOK L PROP. XL PROB. II
Euclid's Elements · Geometry
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