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 76
m two right angles ;since the angles, A and B^ are equal to B and C, take the sameamount, the angle, J5, from each pair, and what remains of onepair is equal to what remains of the other; therefore, the an-gle, A, is equal to the angle, C. The same can be proved ofthe opposite angles, B and D.… … drawn parallel to h e. As ^ c is parallel to e b, the angle, g c d^is, equal, [Art. 135,) to the angle, e b d; as the lines,/c and b e,cut one another at a, the opposite angles, / a c and b a c, areequal, {Art. 14S ;) as the angle,/« c, is equal, [Art. 135,) to theangle, a eg, the angle, a c g, is…
Carpentry · Architecture
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