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The first six books of the Elements of Euclid, in which coloured diagrams and symbols are used instead of letters .. (1847)

Euclid, Byrne, Oliver · London, W. Pickering · leaf 268

An illustration from The first six books of the Elements of Euclid, in which coloured diagrams and symbols are used instead of letters .., 1847, leaf 268 — o fay, fo that ——— and ——— may be in the lameftraight line. Whence alfo ————■ and muft be in the fame ftraight line. (B. i. pr. 14.) Draw ■——— . then > 4 (B. 6. pr. 1.) (B. 5. pr. 7.) (B. 6. pr. 1.) BOOK VI. PROP. XV. THEOR. 235 A (B. 5. pr. 11.) II. Let the fame conftruction remain, and ^^^r *… … ■) contained by the extremes, is equal to the rectangleX -----—- ) contained by the means. PART II.And if the re£l-angle contained bythe extremes be equalto the reSlangle con-tained by the means,the fourJlraight linesare proportional. PART I.From the extremities of — and -■—™ «—o^bb» and i _]_ to…

Geometry

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