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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 54

An illustration from 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, leaf 54
104.— To make a circle equal to tioo given circles. Let .4and i?, [Fig. 71,) be the given circles. In the right-angled tri-angle, ah c, make a b equal to the diameter of the circle, B, andc b equal to the diameter of the circle, A ; then the hypothenuse. … rig. 72. 3a AMERICAN HOUSE-CARPENTER. a Cy will be the diameter of a circle, C, which will be equal in area to the two circles, A and B, added together. Any polygonal figure, as A, {Fig. 72,) formed on the hypo-thenuse of a right-angled triangle, will be equal to two similarfigures,* as B and C,…

Carpentry · Architecture

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