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 60
^j? (pr< 4.). CASE II. Again, let «^——• — «——^—? which lie oppofite the equal angles MmL and 4Hk>. If it be poflible, let -, then take ———■ =: «-■-■—■, draw- Then in * ^ and Lm~. we have — = and = , .. mk. = Mi (pr- 4-) but Mk = mm (hyp-) .*. Amk. = AWL which is abfurd (pr. 16.).… … are parallel. F ajlraight line( ) meet- ing two otherJlraight lines,and ) makes •with them the alternate angles (
Geometry
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