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 153
F from a point without a FIGURE I. circle twojiraight lines be drawn to it, one of which —mm is a tangent to the circle, and the other ^— ——. cuts it; the rectangle under the wholecutting line — «■• and the external fegment — is equal tothe fquare of the tangent ——— . FIGURE I. Let —.-•• pafs… … -2 or minus •~~ ^HH (Liitf BMMW ^Q (B. 2. pr. 6). FIGURE II. If •••■ do not pafs through the centre, draw FIGURE II. and ——-■ , Then minus (B. 2. pr. 6), that is, - X
Geometry
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