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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 154

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 154 — F from a point without a FIGURE I. circle twojlraight lines be drawn to it, one of which —■^» is a tangent tothe circle, and the other ——--cuts it; the re^angle under the wholecutting line — ••«■• and the external fegment ^-^ is equal tothe fquare of the tangent -^— , FIGURE I. Let —i—•• pafs… … minus or mmus (B.2.pr. 6). FIGURE II.If ■•■ do not pafs through the centre, draw FIGURE n. and Tl len X minus (B. 2. pr. 6), that is.

Euclid's Elements · Geometry

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