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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 72

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 72 — RIANGLES ;4H ^ij JH (^Hi tind jm^ ) onequal bajes and between •■•the fame parallels are equal. … Drawand II (pr. 31.). I # (pr. 36.); and ■ i= twice ^^k ^^ = twice ^H (pr- 34-) i k (ax. 7.). Q^E. D. 40 BOOK I. PROP. XXXIX. THEOR,

Euclid's Elements · Geometry

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