If (1,2 ),(3,4 ),(5,6) are the mid points of the sides BC, CA, AB of triangle ABC then the equation of  AB¯

slope of line joining midpoints of AC and BC is 4-23-1This line is parallel to AB and midpoint of AB is (5,6)Equation of AB¯ y–6=4-23-1(x−5)  x−y+1=0