circle

Related Questions

• The radical centre of three circles described on the three sides of a triangle as diameter is

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• If the circle ${{x}^{2}}+{{y}^{2}}+6x-2y+k=0$ bisects the circumference of the circle ${{x}^{2}}+{{y}^{2}}+2x-6y-15=0,$ then $k=$

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• The number of common tangents to two circles ${{x}^{2}}+{{y}^{2}}=4$ and ${{x}^{2}}-{{y}^{2}}-8x+12=0$ is

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• Which of the following lines is a tangent to the circle ${{x}^{2}}+{{y}^{2}}=25$ for all values of m

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