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 167
BOOK IF. PROP. X. PROB. O conJiruSi an ifofcelestriangle, in which each ofthe angles at the bafe fliail n [ be double of the vertical an Take any ftraight line —and divide it fo that 4. x = (B. 2. pr. 11.) … With ■■■■■ as radius, defcribe o and place in it from the extremity of the radius, (B. 4. pr. 1); draw Then \ is the required triangle. For, draw and defcribe I ) about / (B. 4. pr. 5.) .*. —-— is a tangent to I ) (B. 3. pr. 37.)= y\ (B. 3. pr. 32), 136 BOOK IF. PROP. X. PROP. add ^r to each, l! ▼…
Geometry
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