circle

Related Questions

• 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 equation of the circle which passes through the origin, has its centre on the line $x+y=4$ and cuts the circle ${{x}^{2}}+{{y}^{2}}-4x+2y+4=0$ orthogonally, is

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• The angle between the tangents from $(\alpha ,\beta )$ to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ , is

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• The number of circle having radius 5 and passing through the points (– 2, 0) and (4, 0) is

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• The centres of the circles ${{x}^{2}}+{{y}^{2}}=1$ , ${{x}^{2}}+{{y}^{2}}+6x-2y=1$ and ${{x}^{2}}+{{y}^{2}}-12x+4y=1$ are

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