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 44
Vv:. 90.— fo describe a circle within any given triangle^ so thatthe sides of the triangle shall be tangical. Let a b c, [i^ig-50,) be the given tiiangle. Bisect the angles, a and 6, accordingto Art. 77 ; upon d, the point of intersection of the bisectinglines, with the radius d e, describe ihe… … 91.—About a given circle, to describe an equi-lateral tri-angle. Let a d b c, {Fig. 51,) be the given circle. Draw thediameter, c d ; upon d, with the radius of the given circle, de-scribe the arc, a e b ; join a and b ; drsiW f g, at right angles tod c ; make/c and c g, each equal to a b ; from/,…
Carpentry · Architecture
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