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The point of intersection of the diagonals of a square is at the origin,and the coordinate axes are drawn along the diagonals. If the side length of the square is $a$,then which of the following is $NOT$ a vertex of the square?
- A$(a\sqrt{2}, 0)$
- B$\left(0, \frac{a}{\sqrt{2}}\right)$
- C$\left(\frac{a}{\sqrt{2}}, 0\right)$
- D$\left(-\frac{a}{\sqrt{2}}, 0\right)$
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If a square $ABCD$,where $A(0,0), B(2,0), C(2,2)$ and $D(0,2)$ undergoes the following transformations successively,then the final figure would be a:
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