The American house-carpenter; a treatise on the art of building, and the strength of materials (1873)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 85
e,a 1) c, is measured by half the arc, a c, that subtends it. 161.—Proposition. In a circle, all the inscribed angles,a J> c, (Fig. 112,) which stand upon the same side of the chordd e, are equal. For each angle is measured by half the arcdf e, (Art. 160,) hence the angles are all equal.… … Fig. 112.
Carpentry · Architecture
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