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Radius of a Circle Tangent to Two Lines
If the centre is $$(h,k)$$ and the circle is tangent to:
$$A_1x+B_1y+C_1=0$$
then:
$$r=\frac{|A_1h+B_1k+C_1|}{\sqrt{A_1^2+B_1^2}}$$
Usage
- Used to determine the radius once the centre of the circle is known.
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Radius of a Circle Tangent to Two Lines
If the centre is $$(h,k)$$ and the circle is tangent to:
$$A_1x+B_1y+C_1=0$$
then:
$$r=\frac{|A_1h+B_1k+C_1|}{\sqrt{A_1^2+B_1^2}}$$
Usage
- Used to determine the radius once the centre of the circle is known.
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