Long description: circle11
Alt text: The image displays a graph with two concentric circles, \(C_1\) and \(C_2\), centered at the origin on the \(xy\)-plane.
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- The image features a two-dimensional Cartesian coordinate system with the \(x\)-axis and the \(y\)-axis labeled.
- There are two circles drawn, both centered at the origin \((0, 0)\).
- The larger circle is labeled \(C_2\), and the smaller circle inside it is labeled \(C_1\).
- Both circles are shaded light gray, indicating the region they enclose.
- The coordinate axes range from \(-2\) to \(2\) on the \(y\)-axis and from \(-4\) to \(4\) on the \(x\)-axis.
- The circles illustrate the concept of concentric shapes.