Points A(3, 3), B(6, b) C(a,7) and D(5, 6) are vertices of a parallelogram ABCD. Find the
values of a and b.
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Let A(3, 3), B(6, y), C(x, 7) and D(5, 6) be the vertices of a parallelogram ABCD. Join Ac and BD, interesting each other at the point O.
We know that the diagonals of parallelogram bisect each other.
Therefore, O is the midpoint of AC as well as that of BD.
midpoint of AC is
and midpoint of BD is
But, these points coincide at the point O.
x + 3 = 11 and 6 + y =10
x = 8 and y = 4
Hence, x = 8 and y = 4.
I hope it is help you
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