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Circle Tangent to the $$x$$-Axis and Passing Through a Point
If the centre is $$(h,r)$$ and the circle passes through $$(x_1,y_1)$$:
$$(x_1-h)^2+(y_1-r)^2=r^2$$
Usage
- Used to determine a circle tangent to the $$x$$-axis and passing through a given point.
