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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 58

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 58 — ▲ A A A =, CZ or Z2 mk >s not equal to ^^ = ^ then ^—— ss (pr. 4.) for if zz ^^ then ■——« =which is contrary to the hypothefis; is not lefs thanfor if A A=A then (pr. 24.), which is alfo contrary to the hypothefis 1= m* Q^E. D. 26 BOOK I. PROP. XXVI. THEOR. Case I. … F two triangles have two angles of the one re- fpeflively equal to two angles of tlie other,

Geometry

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