circle

Related Questions

• The equation of director circle of the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}},$ is

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• The two circles ${{x}^{2}}+{{y}^{2}}-2x+22y+5=0$ and ${{x}^{2}}+{{y}^{2}}+14x+6y+k=0$ intersect orthogonally provided k is equal to

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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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• The condition that the circle ${{(x-3)}^{2}}+{{(y-4)}^{2}}={{r}^{2}}$ lies entirely within the circle ${{x}^{2}}+{{y}^{2}}={{R}^{2}},$ is

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• If the lengths of the chords intercepted by the circle ${{x}^{2}}+{{y}^{2}}+2gx+2fy=0$ from the co-ordinate axes be 10 and 24 respectively, then the radius of the circle is

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