The American house-carpenter; a treatise on the art of building, and the strength of materials (1867)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 80
ifference of thesquares of the radius and half-chord. That is, the versed sine,a c, {Fig. 109,) equals a h, less c h. ItTow ah is radius, hencetlie radius, minus c 5, equals a c, the versed sine. To find thevalue of c &, it will be observed that ch is the side of the square,cf, while the radius… … Fig 109. triangle, h cd, and the square, h h, is therefore equal to the twosquares, c e and g /*, {Art. 157;) therefore, the square, c f, isequal to the square, h A, minus the square, c e /—or, is equal tothe difference of the squares onhd and c d. Consequently thesquare root of ef is equal to the…
Carpentry · Architecture
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