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The first six books of the elements of Euclid, in which coloured diagrams and symbols are used instead of letters for the greater ease of learners (1847)

Byrne, Oliver, Whittingham, Charles, 1795-1876, Chiswick Press · London : William Pickering · leaf 276

An illustration from The first six books of the elements of Euclid, in which coloured diagrams and symbols are used instead of letters for the greater ease of learners, 1847, leaf 276 — IMILAR poly-gons may be di-vided into thefame number offimilar triangles, eachfimilarpair of ivhic/i are propor-tional to the polygons; andthe polygons are to each otherin the duplicate ratio of theirhomologous fides. … Draw and and and 5 refolving the polygons into triangles.Then becaufe the polygons are limilar,and —

Euclid's Elements · Geometry

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