circle

Related Questions

• The number of common tangents to the circles ${{x}^{2}}+{{y}^{2}}=1$ and ${{x}^{2}}+{{y}^{2}}-4x+3=0$ is

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

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• The slope of the tangent at the point $(h,h)$ of the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ is

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• The four distinct points (0, 0),(2, 0), (0, –2) and (k,–2)are con-cyclic, if k =

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• The line $lx+my+n=0$ is normal to the circle ${{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0$ , if

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