PlaneCirclepublic class PlaneCircle extends Circle
| Fields Summary |
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| public double | cx | | public double | cy |
| Constructors Summary |
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public PlaneCircle(double r, double x, double y)
super(r); // Invoke the constructor of the superclass, Circle()
this.cx = x; // Initialize the instance field cx
this.cy = y; // Initialize the instance field cy
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| Methods Summary |
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| public boolean | isInside(double x, double y)
double dx = x - cx, dy = y - cy; // Distance from center
double distance = Math.sqrt(dx*dx + dy*dy); // Pythagorean theorem
return (distance < r); // Returns true or false
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