This one comes from ACTStudent.org, the makers of the ACT test.
In the standard (x, y) coordinate plane below, 3 of the vertices of a rectangle are shown. Which of the following is the 4th vertex of the rectangle?

F. (3,-7)
G. (4,-8)
H. (5,-1)
J. (8,-3)
K. (9,-3)
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Post your answer in the comments below - lets see if you can get it right!
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Comments
F. (3,-7)
Correct!