[" 7.If "P(1,2),Q(4,6),R(5,7)" and "S(a,b)" are the vertices of a parallelogram "],[" PQRS,then: "]

If P(1,2), Q(4,6), R(5,7) and S(a, b) are the vertices of a parallelogram P Q R S , then

If P(1, 2), Q(4, 6), R(6, 7) and S(a, b) are the vertices of a parallelogram PQRS, then

If P(1,2) ,Q(4,6),R(5,7), and S(a , b) are the vertices of a parallelogram P Q R S , then (a) a=2,b=4 (b) a=3,b=4 (c) a=2,b=3 (d) a=1,b=-1

If P(1,2) ,Q(4,6),R(5,7), and S(a , b) are the vertices of a parallelogram P Q R S , then (a) a=2,b=4 (b) a=3,b=4 (c) a=2,b=3 (d) a=1,b=-1

If P(1,2)Q(4,6),R(5,7), and S(a,b) are the vertices of a parallelogram PQRS, then (a) a=2,b=4(b)a=3,b=4(c)a=2,b=3 (d) a=1 or b=-1

If P(1,2)Q(4,6),R(5,7), and S(a , b) are the vertices of a parallelogram P Q R S , then (a) a=2,b=4 (b) a=3,b=4 (c) a=2,b=3 (d) a=1orb=-1

Show that P(3,4),Q(7,-2),R(1,1) and S(-3,7) are the vertices of a parallelogram.

If P(2,4), Q(0,3), R(3,6) and S(5,y) are the vertices of parallelogram PQRS , then y = . . . . .

If P(1,2), Q(a, b), R(5, 7) and S (2, 3) are the vertices of a parallelogram, then sum of the squares of the length of its diagonals is 2k^(3) where k is equal to

If P(2,4),Q(0,3),R(3,6) and S(5,y) are the vertices of a parallelogram PQRS then the value of y is 7(b)5(c)-7(d)-8