circle

Related Questions

• If the circle ${{x}^{2}}+{{y}^{2}}=4$ bisects the circumference of the circle ${{x}^{2}}+{{y}^{2}}-2x+6y+a=0$ , then a equals

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• Through which of the following pairs of points does the circle ${{x}^{2}}+{{y}^{2}}-12x+1=0$ pass

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• The locus of the middle points of those chords of the circle ${{x}^{2}}+{{y}^{2}}=4$ which subtend a right angle at the origin is

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• If the circles ${{x}^{2}}+{{y}^{2}}=4,{{x}^{2}}+{{y}^{2}}-10x+\lambda =0$ touch externally, then $\lambda $ is equal to

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• 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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