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 124
e-caufe it is the diameter of both circles, which is abfurd. Fig. 3. Next, if it be pomble, let OandO touch externally in two points; draw ——....-. joiningthe centres of the circles, and pamng through one of thepoints of contact, and draw ———■ and ^^—^—. — = (B. 1. def. 15.); and ------- — ——— (B.… … QUALfraight lines (^ )infcribed in a circle are e-qually diji ant from the centre;and alfotJiraight lines equallydijlant from the centre are equal.
Geometry
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