A rectangular room is 3 meters longer than it is wide, and its perimeter is 26 meters. Find the dimension of the room. The lengt
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Given:
The three vertices of the parallelogram are (-3,9), (0,-3), (6,-6).
To find:
The fourth vertex of the parallelogram.
Solution:
Consider the three vertices of the parallelogram are A(-3,9), B(0,-3), C(6,-6).
Let D(a,b) be the fourth vertex.
Midpoint formula:
We know that the diagonals of a parallelogram bisect each other. So, the midpoints of both diagonals are same.
Midpoint of AC = Midpoint BD
On comparing both sides, we get
And,
Therefore, the fourth vertex of the parallelogram is (3,6).