The first six books of the elements of Euclid : with a commentary and geometrical exercises ; to which are annexed a treatise on solid geometry, and short essays on ancient geometrical analysis, and the theory of transversals (1861)
Lardner, Dionysius, 1793-1859 · London : Print. for Taylor and Walton · leaf 80
D C BOOK THE FIRST. 61 … andand supposed by some that Pythagoras acquired a knowledge of them iuEgypt, and was the first to make them known in Greece. Besides the demonstration in the Elements there are others by whichthis celebrated proposition is sometimes established, and which, in aprinciple of such importance, it may…
Geometry
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