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
drawn from the extremities of the diameter, ac, to the given point, b ; the angle formed at that point by theselines, is a right angle. Join the point, b, 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… … 157.—Proposition. The square of the hypothenuse of aright-angled triangle, is equal to the squares of the two remainingsides. Let a b c, (Fig. 108,) be a given right-angled triangle,having a square formed on each of its sides: then, the square, 6 e, isequal to the squares, h c and g b, taken…
Carpentry · Architecture
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
