KnowraAngle bisector theoremLinked fromLinked fromThe 9 pages that link to Angle bisector theorem, each with the reason it gives.All 9Broader topic 1Related 4Compared with 4IncenterRelated: It describes how triangle angle bisectors meet the opposite sides while locating the incenter.Angle bisectorRelated: It translates the bisected angle into a precise side-length ratio.Geometric proofBroader topic: Its proof shows how triangle similarity yields a precise length ratio.Morley's trisector theoremCompared with: It concerns bisector intersections with sides, not intersections among trisectors.Stewart's theoremRelated: Its side division supplies the two base segments when Stewart’s theorem is applied to an angle bisector.Geometric mean theoremCompared with: It concerns a side division by an angle bisector, not the altitude’s length.Midpoint theoremCompared with: It concerns a different kind of division, governed by side-length ratios rather than equal halves.Incenter–excenter lemmaRelated: It converts bisector geometry into side-length relations.Steiner–Lehmus theoremCompared with: It concerns where a bisector meets the opposite side, not the bisector’s length.