The fourth vertex D of a parallelogram ABCD whose three vertices are A

1.	The fourth vertex D of a parallelogram ABCD whose three vertices are A(2,3), B(6,7), C(8,3)
Answer» First find the coordinate of centre of diagonal with the help of coordinate of A and C and with the help of coordinate of centre and coordinate of B just find the coordinate of D by using the formula x1+x2/2 and y1+y2/2

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