Legendre, A. M. (Adrien Marie), 1752-1833, Brewster, David, Sir, 1781-1868, Davies, Charles, 1798-1876 · New York, Wiley & Long · leaf 145
e to BC, cd to CD, «fee.the angle abc is ecjual to ABC, the angle bed to BCD, and so on(Book VI. Prop. Xin.). Also, by reason of the siniilar trian-gles SAB, Sab, we have AB : ah : : SB : Sb ; and by rea^ionof the similar triangles SBC, S6c, we have SB : S6 : : BC :be ; hence AB : ab : : BC : be ;… … 146 GEOMETRY.
Trigonometry · Geometry
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