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 109
F in a circle tivojlraight linescut one another, which donot bath pafs through thecentre, they do not hifecJ one another. If one of the lines pafs through thecentre, it is evident that it cannot bebifedled by the other, which does notpafs through the centre. … But if neither of the lines or pafs through the centre, draw —■—from the centre to their interfedlion. If . be bifedled, ........ J_ to it (B. 3. pr. 3.) ft = i _^ and if be bifefted, ...... J_ (B- 3- Pr- 3-) and .*. j P^ = ^ ; a part equal to the whole, which is abfurd :.*. ——■-— and ii do not…
Geometry
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