The American house-carpenter; a treatise on the art of building, and the strength of materials (1873)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 80
s drawn from the extremities of the diameter, ac, to the given point, b ; the angle formed at mat point by theselines, is a right angle. Join the point, 6, and the centre, d : thelines, d a, d b and d c, being radii of the same circle, are equal;the angle at a is therefore equal, (Art. 142,) to the… … ,57.—Proposition, The square of the hypothenu&e of aright-angled triangle, is equal to the squares of the two remaining•sides. Let a ft e, (Fig. 108.) be a given right-angled triangle,having a square formed on each of its sides: then, the square, b e, isequal to the squares, he and g 6, taken…
Carpentry · Architecture
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