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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 150

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 150 — If the chord fhould pafs through the centre, it is evi-dent the angles are equal, for each of them is a right angle.(B. 3. prs. 16, 31.) But if not, draw from the point of contact, it muft pafs through the centre of thecircle, (B. 3. pr. 19.) w + f = zLJ = f (b. i.pr.32.) = (ax.). Again O =£Dk= +4…

Geometry

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