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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 147

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 147 — but thefe are the chords fubtendingthe equal arcs. Q. E. D. 114 BOOK III. PROP. XXX. PROB.

Euclid's Elements · Geometry

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