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 121
F two circles o titer externally, the Jlraight line——■■i»—-- joining their centres,pajfes through the point of contact. … touch one ano If it be poffible, let join the centres, and not pafs through a point of contact; then from a point ofcontact draw and to the centres. Becaufe and « and - + (B. 1. pr. 20.), = (B. 1. def. 15.), = (B. i.def.15.), + , a part greater than the whole, which is abfurd. The centres are not…
Geometry
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