circle

Related Questions

• The two circles ${{x}^{2}}+{{y}^{2}}-2x+6y+6=0$ and ${{x}^{2}}+{{y}^{2}}-5x+6y+15=0$ touch each other. The equation of their common tangent is

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• The equation of the circle which passes through the intersection of ${{x}^{2}}+{{y}^{2}}+13x-3y=0$ and $2{{x}^{2}}+2{{y}^{2}}+4x-7y-25=0$ and whose centre lies on $13x+30y=0$ is

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• The circles ${{x}^{2}}+{{y}^{2}}=9$ and ${{x}^{2}}+{{y}^{2}}-12y+27=0$ touch each other. The equation of their common tangent is

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• If $2x-4y=9$ and $6x-12y+7=0$ are the tangents of same circle, then its radius will be

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• Radius of the circle ${{x}^{2}}+{{y}^{2}}+2x\cos \theta $ $+2y\sin \theta -8=0$ , is

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