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 70
Draw and ---..-— , »by (Pr- 34> and hyp.); = and II (pr- 33-) And therefore X is a parallelogram : but !->-■ (Pr- 35-) II (ax. 1.). Q. E. D. 38 BOOK I. PROP. XXXVII. THEOR. … RIANGLES k and i on the fame bafe (■—«■—)and bet-ween the fame paral-lels are equal. Draw Produce \ (pr- 31-) L and A and are parallelograms on the fame bafe, and between the fame parallels,and therefore equal, (pr. 35.) ~ twice =r twice i > (Pr- 34-) i Q.E D. BOOK I. PROP. XXXVIII. THEOR. 39
Geometry
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