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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 258

An illustration from The first six books of the Elements of Euclid, in which coloured diagrams and symbols are used instead of letters .., 1847, leaf 258 — 1. pr. 13), but it has been proved = ^^ and therefore lefs than a right angle,which is abfurd. .*. ^^\ and ^->\ are not unequal; .*. they are equal, and fince ^B — \ (hyp.) 4 = 4 (B. 1. pr. 32), and therefore the tri-angles are equiangular. ^ and ^ But if ^^B and ^--^ be affumed to be each not…

Geometry

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