Bailey, Frederick H. (Frederick Harold), 1865- · Boston, London, Ginn & Co. · leaf 124
rcle, and that, hence, no tangent can bedrawn from it to the circle. 58. Chord of Contact. Frotn any point outside a circle two real tangents rnay hedraivn to the circle, and the straight line joining their iesjjec-tive poiiits of contact is called the chord of contact. Let PiPo and P^Pg be the… … Fig. 50. By [26], §54, tlie equations of PjPa and P1P3 are resi)ec-tively x.x + y.y + G (x + X,) + F (y + y,) + C = 0, (1) X3X + y^y + G (x + X3) + F (y + y3) + C - 0. (2) Since Pi is a point of both these lines, x.xj + y,yi + G (xi + X,) + F (y^ + y.) + C =- 0, (3) X3X1 + ysyi + G (x, + xa) + F…
Geometry, Analytic
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