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 71
c, {Fig. 96,) aretogether equal to two right angles, {Ai^t. 130, 133;) also, thethree angles, a b d, e b a and c 6 e, are together equal to two rightangles. 138.—Corollary. Hence all the angles that can be made uponone side of a line, meeting in a point in that line, are togetherequal to two right… … 6 d
Carpentry · Architecture
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