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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 97
tand upon equal (26. 3.) arches; therefore the five archesAB, BC, CD, DE, EA are equal to one another; aud equal archesare subtended by equal (29. 3.) straight lines; therefore the fivestraight lines AB, BC, CD, DE, EA are equal to one another.Wherefore the pentagon ABCDE is equilateral. It is also… … ©F GEOMETRY. BOOK IV. 97 KDCB; therefore the an^le BAE Is equal (27. 3.) to the ana;1e AED:for the same reason, each of the anj;!es ABC, BCD, CDE is equal tothe angle BAE or AED: therefore the pentagon ABCDBis equian-gular: and it has been shown that it is equilateral. Wherefore, inthe given… Euclid's Elements · Geometry · Trigonometry
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