KnowraTangent–secant theoremLinked fromLinked fromThe 4 pages that link to Tangent–secant theorem, each with the reason it gives.All 4Broader topic 1Related 2Compared with 1Power of a pointRelated: The tangent length squared is another expression for the same external point’s power.Secant lineBroader topic: It uses secant lines in circle geometry rather than as average-change approximations.Intersecting chords theoremRelated: It is another external-point form of the circle’s segment-product relation.Intersecting secants theoremCompared with: One secant is replaced by a tangent, giving a squared tangent length.