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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 175

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 175 — (B. I. pr. 26.) In the fame way it may be fhown that the five perpen-diculars on the fides of the pentagon are equal to oneanother. o Defcribe X^ ^ with any one of the perpendicu-lars as radius, and it will be the infcribed circle required.For if it does not touch the fides of the pentagon, but… … pO dcfirihc j r.-TiV chcn: s grom egh:.s: sJ ^nd csiii oik and ^^ Bilect ^JHk andbT ••••••»»»«» and ..-•...... , and ^om the point of fedion, draw ._^B, >••»»• , and ^^^^. (B. i.pr.6):

Euclid's Elements · Geometry

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