circle

Related Questions

• If the equation ${{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0$ represents a circle with x-axis as a diameter and radius a, then

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• The number of circles touching the lines $x=0$ , $y=a$ and $y=b$ is

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• The radical centre of the circles ${{x}^{2}}+{{y}^{2}}-16x+60=0,\,{{x}^{2}}+{{y}^{2}}-12x+27=0,$ ${{x}^{2}}+{{y}^{2}}-12y+8=0$ is

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• The distance between the chords of contact of the tangents to the circle ${{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0$ from the origin and the point $(g,f)$ is

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• Circles ${{x}^{2}}+{{y}^{2}}+2gx+2fy=0$ and ${{x}^{2}}+{{y}^{2}}$ $+2g'x+2f'y=$ $0$ touch externally, if

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