Newcomb, Simon, 1835-1909 · New York, H. Holt and company · leaf 121
iscalled the radical centre of the tliree circles. Cor, Tlie radical centre of three circles is a certai7i pointfrom which the tangents to the three circles are all equal. 90. System of Circles having a Common Radical Axis*The theory of a family of circles, developed analytically in thepreceding… … Solution. From the centre A draw an indefinite line AXperpendicular to the line N. Take any point P on the radical axis N, and from it drawa tangent PT to the given circle. From the same point, P, draw another line, PT, in anydirection whatever; make PT = PT, and from T draw TXperpendicular to PT…
Geometry, Analytic
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