Consider the diagram ABCD corresponding to the given figure,
Once the figure ABCD is obtained, it is observed that it is a rectangle.
The opposite sides of a rectangle are always equal, so F is the correct choice.
All the internal angles of a rectangle are 90 degree, so G is also correct.
A rectangle definitely has 4 vertices, so H is also correct.
But observe that the length of the rectangle is much more than its width. So it cannot have all four sides equal. Therefore, I is False for the given figure.
Thus, it concludes that option I is the correct choice.