The elements of Euclid for the use of schools and colleges : books I., II., III. (1876)
Todhunter, I. (Isaac), 1820-1884 · Toronto : Copp, Clark · leaf 58
ONS. 1. Every right-aiigLd parallelogram, or rectangle, issaid to be contained by any two of the straight lines whichcontain one of the right angles. 2. In every paiallelograni, any of the parallelogramsabout a diameter, together with the two complements, iscalled a Gnomon, BOOK II Thus the… … PROPOSITION 1. THEOREM. If there he two straighl lines, one of which is dividedinto any number of parts, the rectangle cmitahud by thelnio straighl lines is equal to the rectangles contained bythe undicided line, and the several 2}arts of the divided line. Let A and BC be two straight lines ; and…
Geometry · Euclid's Elements · Mathematics, Greek
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