Newcomb, Simon, 1835-1909 · New York, H. Holt and company · leaf 120
s. Wenow have the theorem: The three radical axes of threecircles intersect in a x^oint. Proof Let^, B and C be thethree circles, and let 0 be tlie point in which the radical axis of A and B intersectsradical axis of B and G. Because 0 is on the radical axis of A and B, Tangent 0 to ^ = tangent 0… … THE CIRCLE. 105 Def. Tlie point in which the three radical axes intersect 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…
Geometry, Analytic
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