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 44
re uuou the same base BC, and betweentile same parallels BC, AE. But the paral-leloijram ABCD is double (34. I.) of thetriangle ABC, because the diameter ACdivides it into two e(|Ual parts; where-fore ABCD is also double of the trian-gle EBC. Therefore,if a parallelogram, ^c. Q. E. D. PROP. XLII.… … 44r ELEMENTS
Euclid's Elements · Geometry · Trigonometry
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