circle

Related Questions

• The equation of radical axis of the circles ${{x}^{2}}+{{y}^{2}}+x-y+2=0$ and $3{{x}^{2}}+3{{y}^{2}}-4x-12=0,$ is

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• The circles ${{x}^{2}}+{{y}^{2}}+4x+6y+3=0$ and $2({{x}^{2}}+{{y}^{2}})+6x+4y+C=0$ will cut orthogonally, if C equals

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• The equation of the circle touching $x=0,y=0$ and $x=4$ is

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• The circle ${{x}^{2}}+{{y}^{2}}+4x-4y+4=0$ touches

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• A circle is concentric with the circle ${{x}^{2}}+{{y}^{2}}-6x+12y+15=0$ and has area double of its area. The equation of the circle is

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