It depends on what the coordinates of the first three vertices are!
To determine the coordinates of the fourth vertex of a rectangle, you need to know the coordinates of the other three vertices. If you have the coordinates of three vertices, you can find the fourth by using the properties of a rectangle, where opposite sides are equal and the diagonals bisect each other. For example, if the vertices are A(x1, y1), B(x2, y2), and C(x3, y3), you can find the fourth vertex D(x4, y4) through the midpoint formula or by ensuring that the lengths of the sides and the diagonals are consistent. Please provide the coordinates of the existing vertices for a specific answer.
you look how the difference is and then you multiply it by the other number and then you are answer should be the product.
Count the lengths of each side and sum them up (add them all together.)
It is (4, 5)