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 25
24 ELEMENTS … PROP. X. PROB, To bisect a given finite straight line, that is, to divide itinto two equal parts. Let AB be the given straight line; it is required to divide it intotwo equal parts. Describe (l. i.) upon it an equilateral triangle ABC, and bisect(9.1.) the angle ACB by the straight line CD. AB is…
Euclid's Elements · Geometry · Trigonometry
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