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 73
the side, a c, equal to the side, df; then the third side ofone, b c, is equal to the third side of the other, ef; the angle at bis equal to the angle at e, and the angle at c is equal to the angleat/. For, if one triangle be applied to the other, the three points,6, a, c, coinciding with the three… … 142.—Proposition. The two angles at the base of an isocelestriangle are equal. Let a 6 c, {Fig. 100,) be an isoceles triangle,of which the sides, a b and a c, are equal. Bisect the angle, {Art AMERICAN HOUSE-CARPENTER. ei 77,) 6 a c, by the line, a d. Then the line, h a, being equal tothe line, a c…
Carpentry · Architecture
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