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 163
In and / and > A 4 and common, ,*, «••••••.•. ^^ .■■■...•.». (B. i. pr. 4and 26.) In like manner, it may be fhown alfo that hence with any one of thefe lines as radius, defcribe and it will pafs through the extremities of the o other two; and the fides of the given triangle, being per-pendicular… … O deferibe a circle about a given triangle. ■ and --- (B. I. pr. 10.) From the points of bifedlion draw —■•■■•■■••• J_ -^■~—^ and and refpec-
Euclid's Elements · Geometry
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