Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 74
orm two right angles;since the angles, A and B, are equal to B and C, take the sameamount, the angle, B, 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.… … Fig. 106. drawn parallel to & e. As g c is parallel to e b, the angle, g c djis, equal, [Art. 135,) to the angle, e hd; as the lines,/c and h e,cut one another at a, the opposite angles, f a e and b a c, areequal, {Art. 148 ;) as the angle, / a e, is equal, (J.rf. 135,) to theangle, a eg, the…
Carpentry · Architecture
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