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 85
HE reclangle containedby two Jlraight lines,one of which is dividedinto any number of parts, … i + is equal to the fum of the rectangles contained by the undivided line, and the feveral parts of the divided line. complete the parallelograms, that is to fay, Draw < ...... > (pr. 31.B. i.) ■ =i + l + l
Geometry
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