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 78
s 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, 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… … Fiir. J 57.—Proposition. The square of the hypothenuse of a right-angled triangle, is equal to the squares of the two remaining sides. Let a b c, {Fig-. 108,) be a given right-angled triangle, having a square formed on each of its sides: then, the square, b e, is^ equal to the squares, h c and g 6,…
Carpentry · Architecture
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