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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 281

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 281 — ograms ( and ) are to one anotherin a ratio compounded of the ratios oftheir jides. Let two of the fides ——_—m andabout the equal angles be placedfo that they may form one ftraightline. Since ^ + J = f\\ and J^ = (hyp.), … and /. 4 + ■ 11 and <■ — form one ftraight line (B. 1. Pr. 14);complete £ . Since

Geometry

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