The American house carpenter: a treatise upon architecture, cornices and mouldings, framing, doors, windows and stairs. Together with the most important principles of practical geometry (1852)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 77
nes drawn from the extremities of the diameter, ac, to the given point, h ; the angle formed at that point by theselines, is a right angle. Join the point, h, and the centre, d; thelines, d a,dh and d c, being radii of the same circle, are equal;the angle at a is therefore equal, {Art. 142,) to the… … ^^7.—Proposition. The square of the hypothenuse of aright-angled triangle, is equal to the squares of the two remainingsides. Let a h c, {Fig. 108,) be a given right-angled triangle,having a square formed on each of its sides: then, the square, h e, isequal to the squares, A c and ^ 6, taken…
Carpentry · Architecture
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