If 3 vertices of parallelogram in A(3,-5) , B(7,8) , C(5,-1) . Then find its fourth vertex ?

If 3 vertices of parallelogram in A(3,-5) , B(7,8) , C(5,-1) . Then fi

1.	If 3 vertices of parallelogram in A(3,-5) , B(7,8) , C(5,-1) . Then find its fourth vertex ?
Answer» Draw 2diagonals take point O apply formula (x1+x2)/2. in both diagonals Apply mid point formula to both diagonals and compare midpoints of both diagonals as they will be same as diagonals of parallelogram bisect eacb other . so on comparing you will get the fourth vertics