KnowraOrthocenterLinked fromLinked fromThe 16 pages that link to Orthocenter, each with the reason it gives.All 16Broader topic 3Related 8Compared with 5CentroidCompared with: It is defined by perpendicular lines, not by a balance condition.CircumcenterCompared with: It is defined by perpendicular altitudes rather than equal vertex distances.IncenterCompared with: The orthocenter comes from perpendicular altitudes, not internal angle bisectors.IncircleCompared with: It is a notable triangle center defined by perpendiculars, unlike the incenter’s angle bisectors.Incenter–excenter lemmaCompared with: It arises from perpendicularity rather than angle-bisector distances.