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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 177

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 177 — angles; i^B. i. pr. 32) but (B. i.pr. 13); = m ^ one-third of £Di (B. I. pr. 32% and the angles vertically oppoiite re :::eieare all equal to one another (B. i. pr. i ;\ and iland onequal arches (B. 3. pr. 26), which are fubtended by equalchords (B. 3. pr. 29); and fince each of the angles of… … O infcribe an equilateral andequiangular quindecagon ina given circle. and be the fides of an equilateral pentagoninfcribed in the given circle, and««»-— the fide of an inscribed equi-lateral triangle. The arc fubtended by. and __ _6_I 4 of the wholecircumference. The arc fubtended by 1 _5_1 i…

Euclid's Elements · Geometry

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