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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 120

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 120 — F two circles o o and touch one another internally, the right line joining theircentres, being produced, Jliallpafs througha point of contaSl. For, if it be poffible, let … join their centres, and produce it bothways; from a point of contadl draw ——— to the centre of ( J , and from the fame pointof contadl draw -•-•--— to the centre of I J. Becaufe in 4 + ■■■•■•■•t (B. I. pr. 20.), and o as they are radii of 8B BOOK III. PROP. XI. THEOR. but —^ -|- I rr — ——; take…

Euclid's Elements · Geometry

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