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 128
FIGURE II.Let the given lines be ■^—^ and ^i—^which either are at different fides of the centre,orinterfedt; from the centre draw - -■•-- and -»-«-—- J_ -^^Mi->i» and , FIGURE II. makedraw Since and the centre,but ——— and are equally diflant from (B. 3. pr. 14.); … (Pt. i.B. 3.pr. 15.), Q. E. D. 96 500A ///. PROP. XVI. THEOR.
Euclid's Elements · Geometry
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