EntityQ897296· pop 12· linked from 15 articlesorthocentric systemSign in to saveConnectionscircumscribed circle for triangleEntityorthocenterEntitygeometryEntitytriangleEntitysetEntitypointEntityEuclidean vectorEntitydigital object identifierEntityhyperbolaEntitylaw of sinesEntityaltitudeEntityperpendicularityEntitycongruenceEntitylocusEntitynine-point circleEntityEuler lineEntityorthogonalityEntityhomothetic transformationEntityMathWorldEntitycentroidEntityCategoriesQuadrilateralsTriangle geometry