Legendre, A. M. (Adrien Marie), 1752-1833, Brewster, David, Sir, 1781-1868, Davies, Charles, 1798-1876 · New York, Wiley & Long · leaf 63
(he centre of a gieen circle or arc. Take three points, A, B, C, anywhere in the circumference, or thearc ; draw AB, BC, or suj)pose t hemto be drawn ; bisect those two lines|jy the perpendiculars DE, FG :the point O, where these perpen-diculars meet, w ill be the centresf)ught (Prop. W. Sch.).… … 64 GEOMETRY. PROBLEM XIV.Through a given pointy to dram a tangent l& a given circle. If the given point A lies in the circum- 2ference, draw the radius CA, and erectAD perpendicular to it : AD will be thetangent required (Prop. IX.). If the point A lies without the circle,join A and the centre,…
Trigonometry · Geometry
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