The first six books of the elements of Euclid, in which coloured diagrams and symbols are used instead of letters for the greater ease of learners (1847)
Byrne, Oliver, Whittingham, Charles, 1795-1876, Chiswick Press · London : William Pickering · leaf 247
en as in the fifthdefinition of the Fifth Book. Although we have onlyfhown that this property exifts when m equal 6, and nequal 5, yet it is evident that the property holds good forevery multiple value that may be given to m, and to n. a (B. 5. def 5.) Parallelograms having the fame altitude are…
Euclid's Elements · Geometry
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