Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, Elements of plane and spherical geometry (1826)
Playfair, John, 1748-1819, Euclid · Philadelphia : Marot & Walter · leaf 51
so ELEMENTSPROP. I. THEOR. … If there be two straight lines, one of which is dividedinto any number of parts ; the rectangle contained by thetwo straight lines is equal to the rectangles contained bythe undivided line, and the several parts of the divided line. Let A and BC be two straight lines; and let BC be divided into…
Euclid's Elements · Geometry · Trigonometry
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