Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 42
Fig. 49. PRACTICAL GEOMETRY. 27 heads, window-heads, &c., to rather better advantage than Art.87. For instance, let a b, {Fig. 49,) be the width of the open-ing, and c d the height of the arc. Extend c d, and make d eequal to c d ; join a and e, also e and b ; and proceed as direct-ed at Art.… … Fig. 50. 90.— To describe a circle within any given triangle, so thatthe sides of the triangle shall be tangical. Let a b c, {Fig.50,) be the given triangle. Bisect the angles, a and 6, accordingto Art. 77; upon d, the point of intersection of the bisectinglines, with the radius, d e, describe the…
Carpentry · Architecture
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