Godfrey, C. (Charles), 1873-1924, Siddons, A. W. (Arthur Warry) joint author · Cambridge, University Press · leaf 111
. If any circle of a coaxalsystem cuts the radical axis at C and D say, all the circles mustpass through C and D, for the tangent to the one circle from C(or D) is of zero length, and therefore the tangent from O (or D)to each circle of the system must be of zero length. In the same way, if any two… … fig. 53 COAXAL CIRCLES 93 Non-intersecting coaxal circles. We will now considera construction for a system of coaxal circles for the case inwhich no circle of the system cuts the radical axis (and no twocircles of the system cut one another). [See fig. 55 o» page 94.]
Geometry, Modern
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