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		\node [style=none] (3) at (3, 2) {};
		\node [style=Circle] (4) at (-1.25, 0) {};
		\node [style=Dot] (7) at (-1.25, 0) {};
		\node [style=none] (10) at (-1.75, 0) {$z$};
		\node [style=none] (11) at (0, 4) {};
		\node [style=none] (12) at (4, 0) {};
		\node [style=none] (13) at (0.5, 4) {$y$};
		\node [style=none] (14) at (4, 0.5) {$x$};
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		\node [style=none] (16) at (0, -0.5) {};
		\node [style=none] (17) at (-3, -2.5) {$\left(-\frac{w}{2}, -\frac{h}{2}\right)$};
		\node [style=none] (18) at (3, 2.5) {$\left(\frac{w}{2}, \frac{h}{2}\right)$};
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