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 174
1. pr. 26.) In the fame way it may be mown that the five perpen-diculars on the fides of the pentagon are equal to oneanother. O Defcribe with any one of the perpendicu- lars as radius, and it will be the infcribed circle required.For if it does not touch the fides of the pentagon, but cutthem,… … O defcribe a circle about agiven equilateral and equi-angular pentagon. T andby — and -• , and from the point of fedtion, draw - := ....... (B. i. pr. 6) ; and fince in
Geometry
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