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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 44

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 44 — ( : a perpendicular. ROM a given point ( I ), in a given Jlraight line —), to draw … Take any point (•cut off ) in the given line,(pr- 3-) / \ (Pr. I.), conftrudl draw —— and it fliall be perpendicular tothe given line. For (conft.) (conft.) and - common to the two triangles.

Euclid's Elements · Geometry

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