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Circle Through Origin in Centre-Radius Form
If the centre is $$(h,k)$$ and the circle passes through the origin:
$$r=\sqrt{h^2+k^2}$$
Usage
- Used to determine the radius when the centre and origin are known to lie on the circle.
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Circle Through Origin in Centre-Radius Form
If the centre is $$(h,k)$$ and the circle passes through the origin:
$$r=\sqrt{h^2+k^2}$$
Usage
- Used to determine the radius when the centre and origin are known to lie on the circle.
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