Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 46
given square in Figs. 92, 93, 94, and 95 to be theradius (or diameter) (Fig. 96) of a given circle, then the side of the square tobe constructed half, twice, three, four, or five times the size of the given squarewill be the radii (or diameters) of the circles half, twice, three, four, or fivetimes… … On any right-angled triangle A C B (Fig. 97) let fall a perpendicular fromthe vertex of the right angle to the hypothenuse A B; the triangle will bedivided into two similar triangles, similar to each other and to the originaltriangle, and AD:AC::AC:AB; that is, A C^ = A D X A B ;BD:BC::BC:AB; that…
Mechanical drawing
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