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 76
Make —i^^^— zz ------ (pr. 10.) Draw -. Make J^ = (Pn 23*) Draw | jj ~| (pr. 31.) 4 = twice y (pr. 41.) but T = A (pr. 38.) ,V.4. Q. E. D. 44 BOOK I. PROP. XLIII. THEOR. … HE complements
Geometry
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