Theorem 10.5 : There is one and only one circle passing through three given non-collinear points. Theorem 10.6 : Equal chords of a circle (or of congruent circles) are equidistant from the centre (or centres). Theorem 10.7 : Chords equidistant from the centre of a circle are equal in length.
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Theorem 10.5 : There is one and only one circle passing through three given non-collinear points. Theorem 10.6 : Equal chords of a circle (or of congruent circles) are equidistant from the centre (or centres). Theorem 10.7 : Chords equidistant from the centre of a circle are equal in length.