A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 48
rds, as A,Fig, 41. 63. Theorem..—An inscribed angle is measured hy one-half thearc included letween its sides. III.—The meaning of this is that an inscribed angle like A, which includesany particular arc, as cd, is only half as large as an angle would be at the centre,as cOd, whose sides included…
Geometry · Trigonometry
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