The first six books of the Elements of Euclid, in which coloured diagrams and symbols are used instead of letters .. (1847)
Euclid, Byrne, Oliver · London, W. Pickering · leaf 136
twice 4Pt or twice ;n(B. 3. pr. 20.); 4=4 4 FIGURE II. … FIGURE II.Let the fegment be a femicircle, 01 lefs than afemicircle, draw —■——■ the diameter, alfo draw < = 4 > = *
Geometry
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
